A coated modified positive electrode material and a preparation method therefor. The preparation method for the coated modified positive electrode material comprises the following steps: mixing a lithium source, a precursor and a compound containing M, and performing calcining, crushing and sieving to obtain a sintered product; and putting the obtained sintered product and a compound containing M' into a reaction kettle for stirring, and performing stepwise heating, continuous stirring and cooling to obtain the coated modified positive electrode material. The coated modified positive electrode material has a uniform surface coating, less floating powder and the like, simple and mild preparation conditions, significantly reduced manufacturing processes, more controllable quality stability, and low manufacturing cost, and is more environmentally friendly. The prepared lithium-ion battery interface is relatively more stable, and has advantages in performance such as service life and gas production without affecting capacity.
H01M 4/36 - Selection of substances as active materials, active masses, active liquids
H01M 4/525 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
H01M 4/485 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy
2.
PREPARATION METHOD FOR AND USE OF SODIUM-ION BATTERY NEGATIVE ELECTRODE MATERIAL
66222-NiS, biochar, and a binder in water, heating for reaction, carrying out solid-liquid separation, drying an obtained solid, and sintering in an inert atmosphere to obtain the sodium-ion battery negative electrode material.
H01M 4/58 - Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFySelection of substances as active materials, active masses, active liquids of polyanionic structures, e.g. phosphates, silicates or borates
3.
METHOD FOR REMOVING ALUMINUM AND COPPER FROM A FERRIC PHOSPHATE RESIDUE AND USE THEREOF
A method for removing aluminum and copper from a ferric phosphate residue and the use thereof, the method comprising: subjecting a ferric phosphate residue to acid leaching to obtain an acid leaching solution; then mixing iron simple substance with the acid leaching solution to perform a first copper removal reaction, then mixing same with a soluble sulfide, such as sodium sulfide, and performing a second copper removal reaction, so as to obtain a copper-removed acid leaching solution; mixing an extractant with the copper-removed acid leaching solution, and performing extraction to obtain a ferrous phosphate solution and an aluminum-rich organic phase, thereby completing the removal of aluminum and copper. The present invention uses iron powder and a soluble sulfide for deep removal of copper and then extracts aluminum by using an extractant having high selectivity on aluminum, thus achieving the separation and removal of aluminum and copper. Using the iron powder and soluble sulfide can convert ferric iron in the system into ferrous iron, thereby preventing the loss of iron element during aluminum extraction processes, ensuring the recovery ratio of ferric phosphate to be greater than 99%, and effectively improving the purity of the obtained ferrous phosphate solution.
A nano-cobalt(II) hydroxide, a preparation method therefor, and a use thereof, belonging to the technical field of lithium-ion batteries. The preparation method comprises: reacting a cobalt salt solution and a precipitant solution at 30-35 ℃, and during the reaction process, adjusting the amount of precipitant solution added so as to control the pH of the reaction system to be 13-13.5, and after the reaction is finished, obtaining a nano-cobalt(II) hydroxide slurry. The precipitant solution comprises a liquid alkali and a deflocculant, and the mass ratio of the solute in the liquid alkali to the deflocculant is 1:0.02-0.05. Carrying out the reaction at a lower temperature prevents particle agglomeration caused by intensified Brownian motion among particles, thus facilitating the synthesis of ultra-fine nano-cobalt(II) hydroxide while reducing energy consumption; when the interaction forces between molecules become stronger, the use of both a higher pH and the deflocculant allows good dispersibility to still be maintained, thus reducing the occurrence of agglomeration; and the obtained crystal grains are small in size, are not prone to agglomerate, and have good dispersibility.
H01M 4/525 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
5.
RESOURCE UTILIZATION METHOD FOR IRON-ALUMINUM SLAG AND NICKEL LATERITE ORE ACID LEACHING RESIDUE
Disclosed is a resource utilization method for iron-aluminum slag and nickel laterite ore acid leaching residue, belonging to the technical field of resource recovery and reuse. In the method, ternary solid waste iron-aluminum slag is processed using a suspension roasting pre-reduction pyrogenic method; after initial drying, and by means of a suspension roasting pre-reduction furnace, the iron-aluminum slag is further dried to remove water of crystallization and is pre-reduced, and valuable metals such as Ni and Co are enriched. The method has high pre-reduction efficiency and low production costs, is environmentally friendly, and the entire process is highly operable and produces little ferronickel slag. The ferronickel and nickel pig iron prepared and obtained via the present method have high nickel and iron content, and the ferronickel and nickel pig iron of the present invention have a high Ni, Co, and Fe direct recovery rate.
The present disclosure relates to the technical field of positive electrode materials for lithium ion batteries and provides a high-nickel positive electrode material, and a preparation method therefor and a use thereof. The present disclosure comprises: first preparing a high-nickel core precursor by means of a co-precipitation method, and then preparing a carbonate shell layer containing a dioxime compound by means of a two-step method; obtaining a core-shell structure high-nickel positive electrode material precursor, and carrying out a chelation reaction between the dioxime compound in the carbonate shell layer and nickel ions, so that the nickel content in the carbonate shell layer is reduced, the thermal stability of the high-nickel positive electrode material is improved, and the instability problem caused by an excessively high nickel content in the high-nickel positive electrode material is solved. In addition, due to the chelation reaction between the dioxime compound and the nickel ions, a shell structure having a low nickel gradient can be formed in the carbonate shell layer, and the nickel content in the carbonate shell layer gradually decreases along the direction away from the core structure. In addition, in the present disclosure, an organic solvent is used for washing, so that the impact of water on the structure of the high-nickel positive electrode material can be avoided.
H01M 4/525 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
H01M 4/505 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
A remaining-battery-capacity-based low-carbon recycling method and apparatus for a traction battery, and a computer-readable storage medium. The recycling method comprises: when the carbon emission amount corresponding to the power supply efficiency of a traction battery is greater than a preset carbon emission index value, determining to recycle the traction battery, and additionally providing a heat recovery apparatus in a traction battery recycling apparatus, wherein the heat recovery apparatus is used for recovering heat which is generated when the traction battery breaks, and used for heating air inside the traction battery recycling apparatus; and selecting from among a plurality of different time periods the time period corresponding to the lowest carbon emission amount, so as to recycle the traction battery. The operating efficiency of the traction battery is accurately determined on the basis of real-time working state data of different parameters of the traction battery, and an appropriate occasion is selected for recycling the traction battery; and the impact of recycling the traction battery in different time periods on carbon emissions is calculated, and an appropriate time period is selected for recycling the traction battery.
The present invention belongs to the field of lithium-ion batteries. Disclosed are a lithium iron phosphate composite material and a preparation method therefor. By subjecting lithium iron phosphate to morphology design in a product system, introducing a titanium dioxide nanotube and constructing a cross-linked carbon conductive network coating layer having a special structure, the existing performance defects of lithium iron phosphate are effectively solved, and good rate capability can be shown when lithium iron phosphate is used in a positive electrode material of a lithium-ion battery, and therefore the prepared lithium iron phosphate composite material is very suitable for full-chain integrated production in the field of power batteries.
C01B 25/45 - Phosphates containing plural metal, or metal and ammonium
H01M 4/58 - Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFySelection of substances as active materials, active masses, active liquids of polyanionic structures, e.g. phosphates, silicates or borates
H01M 4/62 - Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodesLithium-ion batteries
9.
WASTE ACTIVATED CARBON MODIFICATION AND REGENERATION METHOD AND MODIFIED AND REGENERATED ACTIVATED CARBON
Disclosed in the present invention are a waste activated carbon modification and regeneration method and modified and regenerated activated carbon. The method comprises: sequentially performing chemical complexation, chemical modification and heating modification regeneration on waste activated carbon to obtain modified and regenerated activated carbon. According to the method in the present application, valuable metals in the waste activated carbon can be recycled by means of the step of chemical complexation; after recycling, the waste activated carbon is modified by means of the step of chemical modification, so that the specific surface area of the waste activated carbon can be increased, the surface functional groups thereof are increased, and the polarity thereof is increased; and then by means of the step of heating modification regeneration, most of organic matters on the waste activated carbon can be decomposed and gasified, thereby reducing the carbon loss, enhancing a pore structure of the activated carbon, and optimizing the adsorption performance of the activated carbon, obtaining the modified and regenerated activated carbon having good performance.
The present application belongs to the field of nickel laterite treatment methods, and specifically relates to a method for producing high-grade nickel matte using nickel laterite. Nickel laterite (such as limonite-type nickel laterite) having high iron content and low nickel and silicon content is used as a raw material, and sequentially undergoes steps such as over-reduction roasting, magnetic separation, and reduction-sulfidation roasting, to prepare high-grade nickel matte. In the process route provided by the present invention, existing equipment such as rotary kilns, electric furnaces, and magnetic separators can be used for production; the process is easy to control, and costs are low. The process route provided by the present application can also achieve the purpose of directly using limonite-type nickel laterite to produce high-grade nickel matte, while ensuring the nickel recovery rate.
A waste battery feeding system for a whole industrial chain, the system comprising: a support frame, wherein a workbench is rotatably provided on the support frame, the workbench has a plurality of stations, a battery cell clamp is fixedly provided on each station, a glue grinding device, a voltage measuring device, an insulation treatment device, a qualified cell grasping device and an unqualified cell grasping device are sequentially provided on the support frame in the circumferential direction of the workbench, and the glue grinding device, the voltage measuring device, the insulation treatment device, the qualified cell grasping device and the unqualified cell grasping device are all arranged corresponding to one station; a first conveyor line arranged on one side of the qualified cell grasping device; and a second conveyor line arranged on one side of the unqualified cell grasping device.
A lithium nickel manganese oxide positive electrode material, a preparation method therefor and a battery, belonging to the technical field of batteries. With regard to the lithium nickel manganese oxide positive electrode material, constructing a lithium phosphate coating layer and a solid electrolyte coating layer on the surface of a lithium nickel manganese oxide crystal effectively inhibits dissolution of transition metal in the positive electrode material, helping to reduce contact between the surface of the material and an electrolyte, thus reducing the corrosion effect of the electrolyte on the surface of the material, and allowing the material to have more excellent cycle performance. Moreover, the provision of the lithium phosphate layer can effectively reduce the phenomenon of low capacity caused by lithium capture by the solid electrolyte from the positive electrode material, thus achieving the purposes of improving the reversible specific capacity and long cycle performance of the material.
H01M 4/525 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
H01M 4/36 - Selection of substances as active materials, active masses, active liquids
H01M 4/58 - Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFySelection of substances as active materials, active masses, active liquids of polyanionic structures, e.g. phosphates, silicates or borates
H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodesLithium-ion batteries
13.
POSITIVE ELECTRODE MATERIAL, PREPARATION METHOD, AND USE
A positive electrode material, a preparation method for a positive electrode material, and a use of a positive electrode material. The positive electrode material comprises titanium dioxide coated on a ternary material, and polydimethylsiloxane is grafted onto the titanium dioxide to form a hydrophobic layer. In one aspect, the hydrophobic layer can physically isolate the ternary material from reacting with water and carbon dioxide in the air. In another aspect, when polydimethylsiloxane is grafted onto titanium dioxide, the connection by means of chemical bonds between the two can form a hydrophobic layer more stable than by bonding or in similar approaches. Moreover, a hydrophobic layer formed by polydimethylsiloxane being grafted onto titanium dioxide, compared with directly using siloxane to modify a ternary material, has better hydrophobicity, and more stable durability in long-term electrolyte infiltration, preventing the reaction of HF acid with titanium dioxide or a positive electrode material in the electrolyte, thus enhancing the chemical stability of the positive electrode material as well as battery safety.
H01M 4/505 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
H01M 4/525 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
H01M 4/36 - Selection of substances as active materials, active masses, active liquids
H01M 4/62 - Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodesLithium-ion batteries
14.
ACTIVE MATERIAL THREAD, PREPARATION METHOD, AND USE
Disclosed in the present disclosure are an active material thread, a preparation method, and a use. The active material thread is formed by an electrode active material, polyester, a conductive agent, and a binder, the active material thread is woven on a filamentous carrier using the textile technology to form an electrode, and because the active material thread has good mechanical properties, the electrode of such a structure has good conformality, so that material pulverization caused by a volume change of the electrode in the charging and discharging process is inhibited to a certain extent, and cracking of an electrode sheet is inhibited. Compared with a traditional electrode manufactured by direct coating, a mesh electrode can improve the stability of the electrode, and can also improve the conductivity of ions, thereby ensuring the lithium ion transmission rate in the electrochemical process.
Provided in the present disclosure is a method for removing phosphorus from extraction wastewater in the hydrometallurgy industry. The method comprises the following steps: S1, adjusting the pH of extraction wastewater to 3.5-4.5, adding ferrous sulfate thereto, and then carrying out an ultrasonic treatment to obtain a suspension; S2, carrying out solid-liquid separation on the suspension, taking out the liquid phase, stirring same, adding an acid solution to adjust the pH to 3-3.5, then adding ferrous sulfate and hydrogen peroxide, introducing oxygen and pressurizing same, and heating same to perform a reaction; S3, adding an alkaline solution thereto to adjust the pH to 7.5-8, then sequentially adding a coagulant and a flocculant thereto, carrying out solid-liquid separation, then taking out the liquid phase, adjusting the pH to 6-7, carrying out ozonation, adding aluminum sulfate after the reaction is finished, carrying out solid-liquid separation, and then measuring the phosphorus content of the effluent.
C02F 1/78 - Treatment of water, waste water, or sewage by oxidation with ozone
C02F 1/72 - Treatment of water, waste water, or sewage by oxidation
C02F 103/16 - Nature of the water, waste water, sewage or sludge to be treated from metallurgical processes, i.e. from the production, refining or treatment of metals, e.g. galvanic wastes
16.
METHOD FOR RECYCLING AND PREPARING IRON PHOSPHATE FROM IRON PHOSPHATE-CONTAINING COLLECTED DUST MATERIAL, AND USE OF IRON PHOSPHATE
A method for recycling and preparing iron phosphate from an iron phosphate-containing collected dust material, comprising the following steps: sieving an iron phosphate-containing collected dust material, adding water to form a slurry, and carrying out filtering to obtain an anhydrous iron phosphate filter cake; preparing a slurry from the anhydrous iron phosphate filter cake and a phosphoric acid solution, and carrying out heating, recrystallization, and solid-liquid separation to obtain an iron phosphate dihydrate filter cake; and drying and roasting the iron phosphate dihydrate filter cake to obtain anhydrous iron phosphate. The anhydrous iron phosphate prepared using the method has a high tap density, a small particle size, a large specific surface area, and a low impurity content, can effectively improve the electrochemical performance of a battery, and has a wide application prospect.
H01M 4/58 - Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFySelection of substances as active materials, active masses, active liquids of polyanionic structures, e.g. phosphates, silicates or borates
17.
POSITIVE ELECTRODE MATERIAL PRECURSOR, PREPARATION METHOD THEREFOR, AND USE THEREOF
Provided in the present disclosure are a positive electrode material precursor, a preparation method therefor, and the use thereof. The preparation method comprises: mixing a glycine buffer solution containing ethylene glycol with a metal source, and reacting same to obtain the positive electrode material precursor. The present disclosure uses the glycine buffer solution as a reaction substrate solution, and adds the metal source to same for reaction, thereby keeping the pH of the system stable, and improving the uniformity and purity of the metal element. In addition, by means of a synergistic effect between glycine and ethylene glycol, interfacial energy of different crystal planes of the precursor particles can be effectively regulated, thereby regulating the growth and arrangement modes of the precursor particles to enable precipitated particles to preferentially grow in the orientation of (003) crystal planes, so as to obtain elongated strip-shaped primary particles, which can provide a rapid diffusion channel for lithium ions, reduces the diffusion resistance of Li+ and improves the orderliness of the crystal structure, thereby improving the rate capability and the cycling stability of the positive electrode material.
H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodesLithium-ion batteries
H01M 4/525 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
18.
PREPARATION METHOD FOR NICKEL SULFATE AND USE THEREOF
A preparation method for nickel sulfate and a use thereof, belonging to the technical field of nickel sulfate preparation. The method comprises: reacting carbon dioxide with a nickel-iron alloy to produce a mixed solid containing nickel oxide and ferrous oxide, and a mixed gas containing carbon monoxide; reacting the mixed solid with sulfuric acid to obtain a first mixed solution containing nickel sulfate and ferrous sulfate, and subsequently removing the ferrous sulfate to obtain nickel sulfate. The described method avoids the problem that flammable and explosive hydrogen gas is generated during traditional nickel sulfate preparation by means of acid leaching of nickel-iron alloys, thus improving the safety of the process. The nickel sulfate thereby obtained can be further used to prepare a lithium nickel manganese cobalt oxide battery precursor.
An electric-pulse desorption recovery method for a positive electrode sheet of a waste lithium-ion battery. The recovery method comprises the following steps: (1) after discharging the waste lithium-ion battery, disassembling same to obtain a positive electrode sheet, performing high-voltage pulse discharging on the positive electrode sheet, then sorting and screening to obtain a positive electrode material and an aluminium foil; and (2) performing infrared heating on the positive electrode material to obtain a positive electrode material powder, performing hydrothermal lithium-supplementing repair on the positive electrode material powder, and calcining the lithium-supplemented repaired material to obtain a regenerated lithium-ion battery positive electrode material. The recovery method has advantages such as low energy consumption, high efficiency in separating the aluminium foil and the positive electrode material, good dispersibility of positive electrode material particles, and a good hydrothermal lithium-supplementing effect, thus achieving the recovery and reuse of positive electrode sheets of waste lithium-ion batteries.
Disclosed is a processing device for a lithium battery positive electrode material, including a base, where the base is fixedly provided with barrel bodies by means of a support, a sleeve is rotatably clamped between the two barrel bodies, a stirring assembly transversely penetrates through interiors of the barrel bodies and the sleeve, the base is further provided with a power mechanism, and the power mechanism separately drives the sleeve and the stirring assembly to rotate. Due to the cooperation of the barrel bodies, the sleeve and the stirring assembly, the stirring assembly can effectively scrape attachments on the inner walls of the barrel bodies, and a first stirring blade in the sleeve and a second stirring blade in the stirring assembly are cooperated to stir, gather and further disperse and disarrange the material, such that the material can be mixed more uniformly.
B01F 29/64 - Mixers with rotating receptacles rotating about a horizontal or inclined axis, e.g. drum mixers with stirring devices moving in relation to the receptacle, e.g. rotating
B01F 35/12 - Maintenance of mixers using mechanical means
A composite lithium manganese iron phosphate material, and a preparation method therefor and the use thereof, which are used in the technical field of lithium-ion battery positive electrode materials. The composite lithium manganese iron phosphate material comprises a lithium manganese iron phosphate active material and a solid additive, the solid additive comprising a porous solid electrolyte and a lithium manganese iron phosphate deposit, wherein the lithium manganese iron phosphate deposit is deposited on pores and the surface of the porous solid electrolyte, and the solid additive is dispersed inside and on the surface of the lithium manganese iron phosphate active material in a particle form. A solid electrolyte transport channel is added to the lithium manganese iron phosphate active material, thereby increasing the contact between a positive electrode and a solid electrolyte sheet, and significantly improving both the transport efficiency and ionic conductivity of interface lithium ions and the cycling stability and chargeable and dischargeable capacity of a battery.
Provided in the present disclosure is a method for preparing iron phosphate by means of full-chain integrated recycling of a waste lithium iron phosphate battery. The method comprises the following steps: (1) mixing a waste lithium iron phosphate material with a mixed chloride, and heating and melting the mixture, so as to obtain a mixed melt; (2) mixing the mixed melt with sodium stearate, then subjecting the mixture to a blowing reaction, and separating same to obtain carbon-containing lithium iron phosphate scum; (3) mixing the scum with an acid solution, adding hydrogen peroxide to perform a leaching reaction, and carrying out solid-liquid separation to obtain a lithium-containing solution and carbon-containing phosphorus iron slag; and (4) mixing the carbon-containing phosphorus iron slag with an acid solution, leaching the mixture to obtain a phosphorus iron solution, adjusting the phosphorus iron ratio, and adding a complexing agent to perform a coprecipitation reaction, so as to obtain iron phosphate. The method of the present disclosure can improve the purity of the recycled lithium, also avoid a multi-step impurity-removal process required to be carried out during the process of preparing iron phosphate from the phosphorus iron slag after lithium extraction, and further improve the purity and phosphorus iron recovery rate of the iron phosphate prepared from the phosphorus iron slag.
Provided in the present disclosure are a lithium manganese iron phosphate positive electrode material, and a preparation method therefor and the use thereof. The preparation method comprises the following steps: (1) mixing an iron source, a manganese source and a solvent, freezing the mixture to obtain a frozen solution A, freezing a phosphorus source solution to obtain a frozen solution B, crushing the frozen solution A and the frozen solution B at a low temperature, and pressing and freezing same to obtain a frozen solution C; (2) placing the frozen solution C in a reflux device, mixing a complexing agent and hydrogen peroxide to obtain a mixed solution, controlling the reflux of the mixed solution between the reflux device and a reaction device, and controlling the concentration and pH of the complexing agent in the system until the frozen solution C is completely melted to obtain a turbid liquid; and (3) subjecting the turbid liquid to a solid-liquid separation treatment, then mixing same with a lithium source, and sintering the mixture to obtain a lithium manganese iron phosphate positive electrode material. In the present disclosure, the raw material solutions are prepared into frozen solutions in advance, and the dissolution of the frozen solutions is controlled by using a reflux method, such that a coprecipitation reaction is slowly carried out, thereby preparing a lithium manganese iron phosphate positive electrode material having a small particle size and uniform element distribution.
C01B 25/45 - Phosphates containing plural metal, or metal and ammonium
H01M 4/58 - Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFySelection of substances as active materials, active masses, active liquids of polyanionic structures, e.g. phosphates, silicates or borates
H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodesLithium-ion batteries
24.
IRON PHOSPHATE, AND PREPARATION METHOD THEREFOR AND USE THEREOF
Iron phosphate, and a preparation method therefor and the use thereof. The preparation method comprises the following steps: (1) mixing a ferrous salt, a phosphorus source and a solvent to obtain a mixed salt solution, and freezing the mixed salt solution to obtain a frozen mixed salt solution; (2) placing the frozen mixed salt solution in a reflux device, controlling the reflux of a hydrogen peroxide solution between the reflux device and a reaction device, controlling the concentration of hydrogen peroxide in the system, and performing a reaction until the frozen mixed salt solution is completely dissolved; and (3) adjusting the pH in the system, and subjecting same to an aging reaction and solid-liquid separation to obtain iron phosphate. The solution containing the ferrous salt and the phosphorus source is frozen in advance, hydrogen peroxide is controlled to flow through the frozen mixed salt solution, and the reaction can be slowly performed by controlling the concentration and flow rate of hydrogen peroxide, such that the iron element and the phosphorus element in the prepared iron phosphate precursor are uniformly distributed, and surface defects are few.
H01M 4/58 - Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFySelection of substances as active materials, active masses, active liquids of polyanionic structures, e.g. phosphates, silicates or borates
25.
TERNARY POSITIVE ELECTRODE MATERIAL, AND PREPARATION METHOD THEREFOR AND USE THEREOF
The present disclosure provides a ternary positive electrode material, and a preparation method therefor and a use thereof. The preparation method comprises the following steps: (1) mixing a nickel source, a cobalt source and a solvent, freezing to obtain a frozen solution A, mixing an aluminum source, a complexing agent and a solvent, freezing to obtain a frozen solution B, crushing the frozen solution A and the frozen solution B at a low temperature, pressing, and freezing to obtain a frozen solution C; (2) placing the frozen solution C in a backflow device, controlling an alkaline backflow liquid to flow back between the backflow device and a reaction device until the frozen liquid C is completely melted to obtain a suspension; and (3) carrying out solid-liquid separation on the suspension, mixing the obtained solid product with a lithium source, and sintering to obtain a ternary positive electrode material. According to the present disclosure, a simple backflow melting operation is used, the proportion of elements of the material can be guaranteed by means of a simple operation, uniform coprecipitation of nickel, cobalt and aluminum is achieved, and an ammonia complexing agent does not need to be used in the method, such that the environmental pollution is reduced, the distribution of the elements of the prepared ternary positive electrode material is uniform, and the lattice order degree is high.
H01M 4/525 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
H01M 4/485 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy
H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodesLithium-ion batteries
A vehicle-mounted battery recovery device (10), comprising a base (100), a suspension carrying mechanism (200), and a material feeding mechanism (300), a liquid cooling mechanism (400), and a positioning and conveying mechanism (500) sequentially arranged along the suspension carrying mechanism (200). The material feeding mechanism (300) is arranged on the base (100) and configured to convey a battery positioning disc (20) to a first predetermined position. The liquid cooling mechanism (400) comprises a liquid cooling driving member (410) and a first sliding door (420). The base (100) is provided with a freezing liquid nitrogen receiving tank (102) and a first sliding slot (104), and the freezing liquid nitrogen receiving tank (102) is communicated with the first sliding slot (104). The liquid cooling driving member (410) is mounted on the base (100). The first sliding door (420) is located in the first sliding slot (104) and slidably connected to the base (100). A power output end of the liquid cooling driving member (410) is connected to the first sliding door (420), so as to drive the first sliding door (420) to open or close the freezing liquid nitrogen receiving tank (102). The suspension carrying mechanism (200) is located above the base (100) and is configured to loosen or clamp the battery positioning disc (20), so as to carry the battery positioning disc (20) from the material feeding mechanism (300) to the freezing liquid nitrogen receiving tank (102) and the positioning and conveying mechanism (500) sequentially. The positioning and conveying mechanism (500) is mounted on the base (100) and configured to position and convey the battery positioning disc (20). The vehicle-mounted battery recovery device (10) further comprises a shell-removal mechanism (1100) and a core-removal mechanism sequentially arranged along a conveying direction of the positioning and conveying mechanism (500).
Disclosed is a method for full-chain integrated recycling of post-lithium-extractraction ferrophosphorus slag from waste batteries. The method comprises the following steps: (1) carrying out primary acid leaching on post-lithium-extractraction ferrophosphorus slag, and adding an iron ion precipitant for reaction to obtain impurity-removed ferrophosphorus slag; (2) carrying out secondary acid leaching on the impurity-removed ferrophosphorus slag to obtain a ferrophosphorus solution; and (3) mixing the ferrophosphorus solution with a buffer solution, carrying out a precipitation reaction, and carrying out heat treatment on obtained precipitates upon completion of reaction to obtain iron phosphate. According to the present application, firstly, impurities in ferrophosphorus slag are removed by means of primary acid leaching, and an iron ion precipitant is added such that iron ions dissolved in the acid leaching form precipitates, avoiding iron loss; and then secondary acid leaching is carried out such that all Fe and P are leached out, effectively increasing the recovery rate of iron in the ferrophosphorus slag. In addition, the iron phosphate precipitation process is carried out in a buffer solution, so that the purity of iron phosphate can be increased, and the uniform consistency of iron phosphate particles can be improved, thereby obtaining high-quality iron phosphate.
A low-carbon battery cell separator and electrode plate separation and recovery device. A traction member pulls an electrode assembly to move in a first direction and through a cutting member, one of recovery mechanisms, one of tearing mechanisms, a further recovery mechanism, a further tearing mechanism and the remaining recovery mechanisms in sequence, so as to recover a first separator, a first electrode plate, a second electrode plate and a second separator in sequence, realizing the automatic recovery of separators and electrode plates of battery cells.
A battery cell electrode sheet and separator winding device. An electrode sheet or a separator is held in place by means of suction cup assemblies (14), and a first driving member drives a rotary drum (11) to rotate, so as to drive the electrode sheet or the separator to cover onto a plurality of suction cup assemblies (14), a plurality of guide rollers (13), and an insertion roller (15), which are located outside of the rotary drum (11); when the rotary drum (11) drives the insertion roller (15) to move to a protrusion of a cam (12), the insertion roller (15) moves outwards in the radial direction of the rotary drum (11) and passes through an insertion slot (211) of a winding drum (21), so as to insert the electrode sheet or the separator into the winding drum (21); then, the rotary drum (11) continues to rotate, such that, under the action of an elastic member (16), the insertion roller (15) exits from the insertion slot (211); next, a third driving member drives a pressing member (22) to fix against an inner wall of the winding drum (21) the electrode sheet or the separator that has been pushed into the winding drum (21); thus, by means of a second driving member driving the winding drum (21) to rotate, the electrode sheet or the separator can be wound into the winding drum (21). The battery cell electrode sheet and separator winding device can complete a winding operation without the need for manually fixing the end of an electrode sheet or a separator, and is thus highly practical.
A vehicle-mounted crushing apparatus (10), comprising: a vehicle container (100); a crushing mechanism (200), which comprises a crushing box (210), a filter plate (220), a sliding door assembly (230) and a crushing assembly (240), wherein the crushing box (210) is mounted in the vehicle container (100), a crushing cavity (202) is provided in the crushing box (210), a feeding port (204) in communication with the crushing cavity (202) is provided in the top of the crushing box (210), an oxygen concentration sensor (2023) is provided in the crushing cavity (202), the filter plate (220) is transversely arranged in the crushing cavity (202) and is connected to an inner wall of the crushing box (210), a plurality of liquid passing holes (222) distributed at intervals are provided in the filter plate (220), a discharge port (206) in communication with a main crushing cavity (2022) is provided on a side wall of the crushing box (210), the sliding door assembly (230) is slidably connected to the crushing box (210), the sliding door assembly (230) is configured to open or close the discharge port (206), the crushing assembly (240) is mounted at the feeding port (204), and the crushing assembly (240) is configured to crush a battery; a nitrogen supply mechanism (300), which comprises a nitrogen pipe body (310) and a supply control valve (320), wherein one end of the nitrogen pipe body (310) is in communication with the main crushing cavity (2022), and the other end of the nitrogen pipe body (310) is externally connected to a nitrogen source, the supply control valve (320) is arranged on the nitrogen pipe body (310), a control end of the supply control valve (320) is electrically connected to the oxygen concentration sensor (2023), and the supply control valve (320) is configured to be opened when the oxygen concentration in the crushing cavity (202) is equal to a preset concentration threshold value; and a waste gas treatment mechanism (400), which is located in the vehicle container (100), wherein the waste gas treatment mechanism (400) is in communication with each of the main crushing cavity (2022) and an evaporation cavity (2024), and the waste gas treatment mechanism (400) is configured for temporary storage and processing of a waste gas.
A battery discharge and casing removal device (10), comprising: a machine body (100), a first conveying mechanism (200), a battery placement support (300), a discharge mechanism (400), a second conveying mechanism (500), a casing removal mechanism (600), a core extraction mechanism (700) and a carrying mechanism (800). The second conveying mechanism (500) comprises a rotating component (520). A plurality of batteries (20) are loaded in batches at a loading position to a positioning discharge area via the battery placement support (300), and are subjected to batch discharging by means of the discharge mechanism (400); and the carrying mechanism (800) moves the battery placement support (300) from the positioning discharge area to the rotating component (520) for batch casing removal and core extraction processing. Performing batch discharge, casing removal and core extraction processing on the plurality of batteries (20) shortens the overall recovery time of the batteries (20).
The present disclosure discloses a method for recycling a lithium-ion battery electrolyte. After the waste lithium-ion battery is discharged, it is frozen and disassembled to obtain a battery cell containing an electrolyte. The battery cell is immersed in a lithium hydroxide solution containing a catalyst for reaction. The battery cell after the reaction is taken out and washed. The washing solution is mixed with the lithium hydroxide solution after the reaction to obtain a mixed solution. The mixed solution is filtered to obtain a filtrate and a filter residue. The filter residue is reacted with a hydrofluoric acid solution to obtain anhydrous lithium salt. The anhydrous lithium salt is mixed with an organic solution, and PF5 gas is introduced. The mixture is reacted, and filtered to obtain an organic liquid. The organic solution is frozen and filtered to obtain lithium hexafluorophosphate.
The present invention relates to the technical field of oil-water separation devices. Disclosed are an oil removal apparatus and a flushing method therefor. The oil removal apparatus comprises a tank body. A lower water distribution region, a first-stage material filling region, an intermediate water collection region, a second-stage material filling region, and an upper water collection region are arranged in sequence from bottom to top in the tank body. A water intake pipe and a water drainage pipe are provided on the tank body. Two layers of perforated plates are disposed in the intermediate water collection region in the tank body. The tank body is further provided with a first-stage water production pipe and a second-stage water production pipe. The water intake pipe, the water drainage pipe, the first-stage water production pipe, and the second-stage water production pipe each is provided with a valve. The tank body is further provided with manholes in one-to-one correspondence with the first-stage material filling region, the intermediate water collection region, and the upper water collection region. The tank body is provided with material discharging ports at the bottoms of the first-stage material filling region and the second-stage material filling region. Water intake and discharge can selectively be performed by means of different piping, and different flushing methods are selected for a first-stage filling material and a second-stage filling material, so that the oil removal effect is improved and the amount of backwashing wastewater is reduced. Material discharging and replacement can be performed on the first-stage filling material and the second-stage filling material by means of material discharging ports, so that the waste of activated carbon is reduced.
C02F 1/40 - Devices for separating or removing fatty or oily substances or similar floating material
C02F 1/28 - Treatment of water, waste water, or sewage by sorption
B01J 20/20 - Solid sorbent compositions or filter aid compositionsSorbents for chromatographyProcesses for preparing, regenerating or reactivating thereof comprising inorganic material comprising free carbonSolid sorbent compositions or filter aid compositionsSorbents for chromatographyProcesses for preparing, regenerating or reactivating thereof comprising inorganic material comprising carbon obtained by carbonising processes
A lithium extraction electrode, a lithium extraction method, and a lithium extraction system. The lithium extraction electrode is designed based on a specific structure, and, after a lithium removal reaction is performed, can be directly used in electrochemical lithium extraction of water; after lithium extraction is completed, lithium ions can be directly recycled by means of a reverse reaction, and the lithium ions can be put into a next batch of water for lithium extraction. Thus there is no requirement for replacement or apparatus assistance, and lithium extraction efficiency is high.
23abc22 material, the removal of Li+22O is reduced, thereby reducing lattice oxygen removal, thus mitigating unstable Mn elements on the surface layer of the material due to oxygen removal, and reducing the formation of a low-capacity spinel structure, wherein x is greater than 0 and less than or equal to 1, a+b+c=1, a is greater than 0 and less than 1, b is greater than or equal to 0 and less than 1, and c is greater than 0 and less than 1. The presence of a fast ion conductor layer can also improve the ion diffusion rate in the lithium-rich manganese-based positive electrode material, thereby effectively improving the ionic conductivity of the lithium-rich manganese-based positive electrode material, improving the capacity, and improving the rate performance and cycling performance.
H01M 4/36 - Selection of substances as active materials, active masses, active liquids
H01M 4/485 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy
H01M 4/505 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
H01M 4/525 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
H01M 4/62 - Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
36.
MANGANESE IRON PHOSPHATE PRECURSOR, LITHIUM MANGANESE IRON PHOSPHATE POSITIVE ELECTRODE MATERIAL, PREPARATION METHOD AND USE
The present disclosure belongs to the technical field of lithium batteries, and specifically relates to a manganese iron phosphate precursor, a lithium manganese iron phosphate positive electrode material, a preparation method, and a use. The present disclosure utilizes the feature of iron phosphate precipitation and aluminum phosphate precipitation having similar Ksp, first synthesizing aluminum iron phosphate by means of coprecipitation, and mixing the aluminum iron phosphate evenly, and then using a reaction between aluminum iron phosphate and manganese chloride to prepare a stable manganese iron phosphate precursor; aluminum chloride generated during the reaction can be directly volatilized. The synthesis route provided by the present disclosure can effectively solve the problem of a non-uniform manganese iron phosphate precursor caused by directly coprecipitating manganese phosphate and iron phosphate; the iron-manganese ratio of the prepared manganese iron phosphate precursor is closer to a target value, and the specific capacity and cycle performance of the lithium manganese iron phosphate then prepared using said precursor can be effectively improved. The entire process is simple and easy to operate, with low process costs, and has very good prospects for industrial application.
The present disclosure relates to the technical field of analytical chemistry, and in particular to a method for measuring the content of calcium fluoride in lithium iron phosphate hydrometallurgical waste residues. The method comprises: using citric acid to treat lithium iron phosphate hydrometallurgical waste residues to dissolve iron and aluminum in the waste residues, using the reducibility of the citric acid to reduce Fe3+into Fe2+ to avoid complexation with fluoride ions, and due to calcium fluoride being insoluble in the citric acid, separating iron and aluminum from the lithium iron phosphate hydrometallurgical waste residues by means of a solid-liquid separation method; and using inorganic strong acid to dissolve the solid material obtained after solid-liquid separation to obtain a solution under test, using a fluorine ion selection electrode to accurately measure the content of fluorine in said solution, and then calculating the content of calcium fluoride in the lithium iron phosphate hydrometallurgical waste residues. The measurement method provided by the present disclosure does not require the addition of iron and aluminum masking agents such as triethanolamine, has the advantages of involving simple and convenient operation and low costs, and can be used for quickly and accurately measuring the content of calcium fluoride in lithium iron phosphate hydrometallurgical waste residues on a large scale.
G01N 27/26 - Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variablesInvestigating or analysing materials by the use of electric, electrochemical, or magnetic means by using electrolysis or electrophoresis
38.
LITHIUM BATTERY POSITIVE ELECTRODE PROCESSING WASTEWATER RECOVERY AND TREATMENT APPARATUS AND METHOD
The present application relates to the technical field of lithium battery positive electrode processing wastewater recovery and treatment. Disclosed are a lithium battery positive electrode processing wastewater recovery and treatment apparatus and method. The apparatus comprises: a collection unit, comprising a first storage tank and a second storage tank, the first storage tank being configured to store phosphorus-containing wastewater, and the second storage tank being configured to store lithium-containing wastewater; a reaction unit, comprising a pool body and a press filtration module, wherein the pool body comprises a reaction chamber and a precipitation chamber communicated with each other, a stirring module is mounted in the reaction chamber, a horizontally arranged filling material layer and a vertically arranged partition plate are mounted in the precipitation chamber, a side of the filling material layer is connected to the partition plate, the partition plate and the filling material layer divide the precipitation chamber into an upper region and a lower region, the press filtration module comprises a diaphragm pump and a filter press, and the lower region is communicated with the filter press by means of the diaphragm pump; and a test unit, comprising a pH meter, a flow meter, and a turbidity meter. According to the recovery and treatment apparatus and method of the present application, wastewater residues can be fully utilized and the costs of wastewater recovery are reduced.
A Prussian blue positive electrode material, and a preparation method therefor and a use thereof. The preparation method comprises the following steps: (1) respectively freezing a portion of a sodium ferrocyanide solution and a portion of a transition metal salt solution, crushing the frozen sodium ferrocyanide solution and the frozen transition metal salt solution at a low temperature and mixing same, and pressing and freezing to obtain a frozen mixed solution; (2) mixing the other portion of the sodium ferrocyanide solution and the other portion of the transition metal salt solution at a low temperature, and then performing heating treatment to obtain a seed crystal suspension; and (3) placing the frozen mixed solution in a backflow device, controlling the seed crystal suspension to flow back between a reaction kettle and the backflow device until the frozen mixed solution is completely dissolved, and then performing aging treatment to obtain a Prussian blue positive electrode material. According to the method, the reaction rate can be controlled, so that the reaction rate is low, particle agglomeration is reduced, and the electrical performance of the material is more excellent.
H01M 4/58 - Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFySelection of substances as active materials, active masses, active liquids of polyanionic structures, e.g. phosphates, silicates or borates
H01M 10/054 - Accumulators with insertion or intercalation of metals other than lithium, e.g. with magnesium or aluminium
40.
TERNARY POSITIVE ELECTRODE MATERIAL, AND PREPARATION METHOD THEREFOR AND USE THEREOF
Provided in the present disclosure are a ternary positive electrode material, and a preparation method therefor and the use thereof. The preparation method comprises the following steps: (1) mixing a nickel source, a cobalt source, a non-ammonia complexing agent and a solvent, freezing the mixture to obtain a frozen solution A, freezing a manganese salt solution to obtain a frozen solution B, crushing the frozen solution A and the frozen solution B at a low temperature, and pressing and freezing same to obtain a frozen solution C; (2) placing the frozen solution C in a reflux device, controlling the reflux flow of an alkaline reflux between the reflux device and a reaction device until the frozen solution C is completely melted to obtain a turbid liquid, and subjecting the turbid liquid to solid-liquid separation to obtain a precursor; and (3) mixing the precursor with a lithium source, and sintering the mixture to obtain a ternary positive electrode material. By means of the method of the present disclosure, grains can be slowly generated, thereby avoiding a seed crystal agglomeration phenomenon caused by excessive fast growth, and nickel, cobalt and manganese elements in the prepared precursor are uniformly distributed, thereby improving the electrochemical performance of the ternary positive electrode material.
H01M 4/525 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
H01M 4/505 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodesLithium-ion batteries
41.
METHOD FOR MEASURING CHROMIUM CONTENT IN LATERITE-NICKEL ORE
The present invention relates to the technical field of detection and analysis. Disclosed is a method for measuring the chromium content in laterite-nickel ore. In the present invention, a standard addition method is used, that is, a matrix in a standard solution is similar to a sample matrix, and analysis parameters are reasonably selected, so that matrix effects of easily ionized elements and other elements can be suppressed or eliminated. That is, laterite-nickel ore is digested by using a simple, efficient and low-cost method integrating sodium peroxide alkali fusion, hot water leaching, and hydrochloric acid dissolution, and the ionization interference of ICP-OES is reduced by the standard addition method, so that current research and development requirements are met, and a fast and simple method is provided for subsequent batch testing.
G01N 21/73 - Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light thermally excited using plasma burners or torches
Disclosed in the present invention are a salt lake lithium extraction device and method, belonging to the technical field of salt lake lithium extraction. The salt lake lithium extraction device comprises: a feed liquid tank, a cathode chamber, an anode chamber, an extraction tank and a boron removal tank, wherein the feed liquid tank, the cathode chamber, the anode chamber, the extraction tank and the boron removal tank are sequentially separated by exchange membranes, and the extraction tank is connected to a back extraction tank. In the present disclosure, by means of providing the extraction tank and the boron removal tank, formation of boric acid precipitation which affects lithium extraction is effectively avoided during the lithium extraction process, and moreover, boron removal reaction is carried out while lithium extraction is performed, such that brine does not need to be pretreated for boron removal, thus simplifying the process, and effectively improving the lithium recovery rate and the purity of lithium.
C22B 3/20 - Treatment or purification of solutions, e.g. obtained by leaching
C22B 3/38 - Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds containing phosphorus
43.
COMPOSITE LITHIUM EXTRACTION ADSORBENT, AND PREPARATION METHOD THEREFOR AND USE THEREOF
Provided in the present disclosure are a composite lithium extraction adsorbent, and a preparation method therefor and the use thereof. The composite lithium extraction adsorbent comprises a lithium extraction adsorbent and a modified oxygen evolution catalyst provided on the surface of the lithium extraction adsorbent, and the modified oxygen evolution catalyst comprises a sulfur-containing NiFe-LDH oxygen evolution catalyst. In the present disclosure, the lithium extraction adsorbent and the modified oxygen evolution catalyst are compounded to prepare the composite lithium extraction adsorbent, the composite lithium extraction adsorbent is electrified during the adsorption and lithium extraction process to ensure that OH-on the surface of the adsorbent is consumed, and also, the adverse effect of ClO- is eliminated, the alkalinity of the surface of the adsorbent is reduced, corrosion of the adsorbent is reduced, and the service life of the adsorbent is prolonged.
B01J 20/04 - Solid sorbent compositions or filter aid compositionsSorbents for chromatographyProcesses for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of alkali metals, alkaline earth metals or magnesium
B01J 20/30 - Processes for preparing, regenerating or reactivating
C25B 1/04 - Hydrogen or oxygen by electrolysis of water
44.
DEVICE AND METHOD FOR EXTRACTING LITHIUM FROM SALT LAKE
Provided in the present disclosure are a device and method for extracting lithium from a salt lake. The device comprises a power supply, a lithium-extracting compartment, a lithium-removing compartment and an electrolyte compartment. The method comprises the following steps: (1) mixing a lithium-removing material and an electrolyte to prepare a lithium-removing flowing slurry, and mixing a lithium-intercalated material and lithium-containing salt lake brine to prepare a lithium-intercalated flowing slurry; (2) injecting an electrolyte into the electrolyte compartment, making the lithium-removing flowing slurry flow through the lithium-removing compartment, making the lithium-intercalated flowing slurry flow through the lithium-extracting compartment, and energizing same to carry out a lithium-extracting reaction; and (3) collecting the liquid flowing out of the lithium-extracting compartment, filtering same and then mixing same with the electrolyte, making the mixture flow through the lithium-removing compartment, continuing to carry out the lithium-extracting reaction, and collecting the liquid in the electrolyte compartment to obtain a lithium-rich solution. The device for extracting lithium from a salt lake of the present disclosure has a simple structure, and the method reduces the impurity-removing pressure of an ion exchange membrane and prolongs the service life of the ion exchange membrane; in addition, the obtained lithium-rich solution has a low impurity concentration, and the effect of impurity removal is better.
Disclosed are a lithium iron manganese phosphate, and a preparation method and the use thereof, belonging to the technical field of battery materials. Manganese ferrous phosphate is synthesized by using a coprecipitation method, and oxidized with chlorine gas. During the oxidation process, some ferrous ions are oxidized into trivalent iron, which reacts with chlorine gas to generate ferric chloride. With the volatilization of ferric chloride, the trivalent iron is removed, which forms channels available for lithium ion diffusion in manganese ferrous phosphate, thereby improving the diffusion rate of lithium ions, and forming a lithium iron manganese phosphate positive electrode material with a more stable structure and excellent performance.
The present disclosure belongs to the field of lithium ore metallurgy. Provided in the present disclosure is a method for extracting lithium and aluminum from red mud and lithium chinastone. The method comprises: mixing lithium chinastone and red mud, subjecting the mixture to primary roasting, soaking same in water to obtain a soaked material, subjecting the soaked material to secondary roasting, subjecting the soaked material from the secondary roasting to primary leaching to obtain a leachate, and removing impurities from the resulting leachate to obtain an accepted lithium liquid product, and subjecting the resulting leaching residue to secondary leaching to obtain an aluminum solution with a high aluminum content, thereby achieving the extraction of both lithium and aluminum, and the effective separation thereof. In the method, the red mud, which is also industrial solid waste, is used as a raw material, and lithium is directly extracted from the lithium chinastone ore raw material; the method is simple and reliable, and has low production costs and a high lithium recovery rate reaching 98.7% or more, thereby facilitating large-scale industrialization; and the method uses a large amount of industrial solid waste, and is more environmentally friendly with considerable economic benefits.
A step-by-step recycling method for decommissioned lithium batteries. The method comprises the following steps: performing pre-processing on a decommissioned lithium battery, to obtain a powder; mixing the powder and a first organic acid, and performing a leaching reaction, to obtain a leachate containing lithium and aluminum, and a first leaching residue; mixing the first leaching residue and a composite ammonia source, and performing a leaching reaction, to obtain a copper-containing leachate and a second leaching residue; performing acid leaching on the second leaching residue, to obtain a solution containing nickel, cobalt, manganese and iron, and a third leaching residue; and mixing the solution containing nickel, cobalt, manganese and iron with a pH value regulator, performing a reaction, and aging, to obtain a solution containing nickel, cobalt, and manganese, and an iron precipitation residue. The method reduces the loss of valuable metal elements lithium, nickel, cobalt and manganese, and the output of slag; increases the recovery rate of metallic lithium; implements high-value utilization of copper and aluminum in the leaching solution; and reduces process production costs. In addition, reclamation and reduction of solid waste in a lithium battery wet recycling process is achieved.
C22B 7/00 - Working-up raw materials other than ores, e.g. scrap, to produce non-ferrous metals or compounds thereof
C22B 3/16 - Extraction of metal compounds from ores or concentrates by wet processes by leaching in organic solutions
C22B 3/14 - Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic alkaline solutions containing ammonia or ammonium salts
Disclosed are an electrode material for lithium extraction from salt lake, and a preparation method and a use thereof. The preparation method comprises the following steps: (1) heating an electrode active material, and mixing the heated electrode active material with an organic solvent to obtain a dispersion liquid; (2) mixing the dispersion liquid with an organic positive electrode coating agent, and implementing a heating reflux reaction; and (3) cooling a material obtained by the heating reflux reaction, and removing a supernatant after centrifugation to obtain an electrode material for lithium extraction from salt lake. In the present application, an organic positive electrode material coating layer is coated on the surface of an electrode material, so that the mechanical strength of an electrode can be improved, and the electrode has high lithium ion conductivity in the lithium extraction process while the electrode capacity is not reduced.
Disclosed is an apparatus for efficiently pretreating and recycling a waste battery, which includes a bottom plate, a recycling device, a conveying device and a treatment device, and one end of a top portion of the bottom plate is fixedly mounted with a bottom portion of the conveying device. According to the invention, by arranging a fixing assembly and the recycling device, a suction pump can suck a slurry and an electrolyte in a battery downwardly for dropping, and a driving assembly can rapidly convey the slurry and the electrolyte in the battery to the treatment device for treatment at the same time.
H01M 10/54 - Reclaiming serviceable parts of waste accumulators
B02C 18/10 - Disintegrating by knives or other cutting or tearing members which chop material into fragmentsMincing machines or similar apparatus using worms or the like with rotating knives within vertical containers with drive arranged above container
B02C 23/16 - Separating or sorting of material, associated with crushing or disintegrating with separator defining termination of crushing or disintegrating zone, e.g. screen denying egress of oversize material
B04B 11/00 - Feeding, charging, or discharging bowls
B65G 51/00 - Conveying articles through pipes or tubes by fluid flow or pressureConveying articles over a flat surface, e.g. the base of a trough, by jets located in the surface
Disclosed are a lithium extraction device and a lithium extraction method, relating to the technical field of lithium extraction. In the lithium extraction device, by providing a movable ionic membrane, the ionic membrane can be replaced or adjusted according to requirements, without replacing electrodes, so as to perform multiple adsorption and desorption processes. In this process, the ionic membrane does not need to be cleaned, thereby omitting cleaning water, and greatly saving energy consumption and costs. Moreover, in this process, intercalated and deintercalated electrodes do not need to be replaced back and forth, thereby improving the lithium extraction efficiency.
Disclosed is a method for recycling materials in waste batteries by means of full-chain integrated treatment, relating to the technical field of battery recycling. The method comprises: grafting a positive electrode sheet and a separator connected to the positive electrode sheet in a waste battery, so that the separator and a positive electrode binder for the positive electrode sheet are cross-linked by means of a graft; swelling the grafted material to reduce the bonding force between the positive electrode binder and a positive electrode current collector in the positive electrode sheet; and under the action of an external force, separating the positive electrode current collector from a positive electrode active material to which the separator is bonded. By means of the method, the positive electrode active material and the current collector in the waste battery can be effectively separated, and then the separated materials can be recycled.
A device and method for stripping aluminum foil and a positive electrode material of a waste lithium ion battery based on full-chain integration. The device for stripping the aluminum foil and the positive electrode material of the waste lithium ion battery based on the full-chain integration comprises: a freezing mechanism (110), a positive electrode sheet traction mechanism (120), a laser heating mechanism (140), a negative pressure mechanism (160), and a stripping chamber (130). The freezing mechanism (110) is disposed outside the stripping chamber (130) and is configured to freeze a positive electrode sheet (200) placed on the positive electrode sheet traction mechanism (120). The positive electrode sheet traction mechanism (120) passes through the stripping chamber (130). The laser heating mechanism (140) is located in the stripping chamber (130) and oriented toward the positive electrode sheet (200) on the positive electrode sheet traction mechanism (120). The negative pressure mechanism (160) is located in the stripping chamber (130) and is located below the positive electrode sheet traction mechanism (120). A scraper (131) is further disposed in the stripping chamber (130). The scraper (131) is disposed on an upper surface of the positive electrode sheet traction mechanism (120) and is in contact with the positive electrode sheet (200) to strip off the aluminum foil (201) and the positive electrode material of the positive electrode sheet (200). According to the device, the efficient separation of the positive electrode material and the aluminum foil is implemented, and the purity of a recycled material is increased.
Disclosed are a preparation method for flaky iron phosphate and a preparation method for flaky lithium iron phosphate. According to the present disclosure, electrical pulses are introduced during the preparation of iron phosphate, so that the reaction rate during iron phosphate synthesis can be controlled, and impurity ions entrained during iron phosphate precipitation can be reduced; in addition, flaky iron phosphate can be obtained, and then flaky lithium iron phosphate having good electrochemical performance is obtained; furthermore, the presence of the electrical pulses is beneficial to generating flaky iron phosphate having a smaller size and improving the density of iron phosphate, thereby improving the electrochemical performance of lithium iron phosphate which serves as a positive electrode material.
C01B 25/45 - Phosphates containing plural metal, or metal and ammonium
H01M 4/58 - Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFySelection of substances as active materials, active masses, active liquids of polyanionic structures, e.g. phosphates, silicates or borates
H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodesLithium-ion batteries
54.
METHOD FOR EXTRACTING FLUORINE FROM NICKEL-COBALT-MANGANESE SULFATE SOLUTION
The present application relates to the field of wastewater treatment, and discloses a method for extracting fluorine from a nickel-cobalt-manganese sulfate solution. The method comprises the following steps: mixing a nickel-cobalt-manganese sulfate solution and concentrated sulfuric acid for activation; carrying out multi-stage countercurrent extraction on the activated liquid by means of an organic phase, wherein the organic phase comprises tributyl phosphate, isooctyl alcohol, and a diluent; carrying out multistage countercurrent washing on the fluorine-containing organic phase; and carrying out multi-stage countercurrent stripping on the washed fluorine-containing organic phase. According to the present application, for extraction of fluorine in a nickel-cobalt-manganese sulfate solution, tributyl phosphate is used as the extractant, and isooctyl alcohol is added to improve phase separation in a mixer-settler; the process steps are simple and the extraction rate is as high as 90% or above.
The present application discloses a method for preparing ferric phosphate, including the following steps: mixing a surfactant with a first metal liquid containing iron and phosphorus elements, adding with adding seed crystal, aging under heating and stirring, filtering the aged solution to obtain a filter residue, and drying and sintering the filter residue, thereby obtaining the ferric phosphate; the seed crystal is ferric phosphate dihydrate or basic ammonium ferric phosphate. In the present application, the surfactant is used for modification of the seed crystal, secondary crystal nucleus is generated, which induces the formation of the basic framework of the product particles. Through the aging process, the deposition of the crystal nucleus on the surface of the seed crystal makes the framework of the crystal grain more complete, so that the primary particles are arranged more densely and orderly and tend to constitute spherical secondary particles.
A high-voltage ternary positive electrode material includes ternary positive electrode active material particles and a flexible coating body, the flexible coating body being coated on surfaces of the ternary positive electrode active material particles; wherein, the flexible coating body includes a mixture of polyaniline and a polyurethane elastomer.
H01M 4/36 - Selection of substances as active materials, active masses, active liquids
H01M 4/525 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
H01M 4/62 - Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
H01M 10/42 - Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
57.
METHOD FOR RECYCLING AND TREATING ELECTROLYTIC SOLUTION OF LITHIUM ION BATTERY
A method for recycling and treating an electrolytic solution of a lithium ion battery includes S1: cooling a fully discharged lithium ion battery below a freezing point of the electrolytic solution, and then disassembling and crushing the lithium ion battery to obtain a crushed solid containing the electrolytic solution, S2: under a protection of an inert gas, placing the crushed solid in a supercritical CO2 extraction instrument in which an entrainer is added; S3: conducting extraction; and S4: collection an extraction product with a cryogenic device, and adsorbing water in the extraction product using a 4 Å type lithiated molecular sieve, adsorbing HF in the extraction product using weak-base anion-exchange resin and adsorbing organic acid and alcohol in the extraction product using a 5 Å type lithiated molecular sieve.
B01D 15/34 - Size-selective separation, e.g. size-exclusion chromatographyGel filtrationPermeation
B01D 15/36 - Selective adsorption, e.g. chromatography characterised by the separation mechanism involving ionic interaction, e.g. ion-exchange, ion-pair, ion-suppression or ion-exclusion
B09B 3/80 - Destroying solid waste or transforming solid waste into something useful or harmless involving an extraction step
Doped cobaltosic oxide and a preparation method therefor. According to the method, a pre-oxidation process is used in combination with specific processing additives to prepare the product, such that the "sticking to a furnace" phenomenon can be effectively alleviated. In addition, the product prepared has high particle uniformity and is free of obvious cracking, a doping element has a gradient distribution, and a lithium cobalt oxide material prepared has good electrochemical performance. The method makes full-chain integrated production of doped cobaltosic oxide in the field of lithium batteries possible.
c1-dde2-ea1-bbf2-f2-f, the M element being a doping element, the Q element being a wrapping element, the T element being a doping element, and the E element being a wrapping element. By matching large and small particles of lithium cobalt oxide, an oxygen reduction reaction between an electrolyte and the surface of a positive electrode material can be inhibited, Co valence state changes in the positive electrode material are inhibited, Co dissolution is reduced, the capacity is increased, and the storage and gas production performance of a lithium cobalt oxide positive electrode material are improved.
H01M 4/485 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy
H01M 4/525 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodesLithium-ion batteries
60.
METHOD FOR PREPARING SODIUM HYDROXIDE ON BASIS OF SODIUM SULFATE WASTEWATER GENERATED DURING LITHIUM BATTERY RECOVERY
A method for preparing sodium hydroxide on the basis of sodium sulfate wastewater generated during lithium battery recovery. The method comprises the following steps: adding a calcium oxide powder to sodium sulfate wastewater, and mixing and reacting same, so as to obtain a mixed reaction solution; filtering the mixed reaction solution, so as to obtain a reaction mother solution; subjecting the reaction mother solution to a nanofiltration operation, so as to obtain a sodium hydroxide solution and a concentrated sodium sulfate solution; subjecting the sodium hydroxide solution to a reverse osmosis operation, so as to obtain the sodium hydroxide solution; subjecting the sodium hydroxide solution, which has undergone the reverse osmosis, to an electrodialysis operation, so as to obtain the sodium hydroxide solution; and subjecting the sodium hydroxide solution, which has undergone the electrodialysis, to an evaporation and concentration operation, so as to obtain the sodium hydroxide solution.
Disclosed are a method for synthesizing a ternary precursor under assistance of electric pulses and a use. According to the present disclosure, under the action of electric pulses, a coprecipitation reaction slows down the growth speed of a crystal nucleus without using a complexing agent, so that the obtained crystal grains are finer, and have higher sphericity; and the presence of the electric pulses in the aging process can also make the growth of the crystal grains more uniform and denser.
A fouled material treatment method. The method comprises: using sulfuric acid to carry out first leaching treatment on a fouled device to be treated; and using mixed acid to carry out second leaching treatment on the fouled device that has been subjected to the first leaching treatment, wherein the mixed acid comprises phosphoric acid and other acids, and the other acids do not contain any one of hydrochloric acid, nitric acid, oxalic acid, and hydrofluoric acid. The method consumes a short time, has a good fouled material removal effect and low cost, would not cause serious corrosion to devices, can implement recycling of leachates, and can be widely used for the cleaning of fouled materials in different devices.
A method for measuring the content of tricobalt tetraoxide in lithium cobalt oxide, relating to the technical field of quantitative measurement of tricobalt tetraoxide. The method comprises the following steps: carrying out acid treatment on a lithium cobalt oxide sample to be tested to dissolve lithium cobalt oxide, and then carrying out solid-liquid separation, reacting the solid obtained by separation with a potassium permanganate solution and a sulfuric acid solution, adding a potassium iodide solution to end the reaction, and titrating to an end point with a sodium thiosulfate solution by taking starch as an indicator. By means of the method, a measurement result having high accuracy can be obtained.
G01N 21/78 - Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator producing a change of colour
G01N 31/16 - Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroupsApparatus specially adapted for such methods using titration
G01N 31/22 - Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroupsApparatus specially adapted for such methods using chemical indicators
64.
METHOD FOR EXTRACTING LITHIUM FROM SALT LAKE BY USING FLOW ELECTRODE, AND DEVICE FOR EXTRACTING LITHIUM FROM SALT LAKE
The present disclosure relates to the technical field of salt lake lithium extraction and recovery, and in particular to a method for extracting lithium from a salt lake by using a flow electrode, and a device for extracting lithium from a salt lake. By using a flow electrode slurry mixed with a lithium intercalation/deintercalation active material as a lithium ion electric deintercalation carrier, using a flow electrode slurry mixed with a calcium intercalation/deintercalation active material as a calcium ion electric deintercalation carrier, and incorporating an electrochemical principle, salt lake lithium extraction is carried out, and in the process of lithium intercalation, Ca2+and Mg2+ generate a competitive effect when entering a flow electrode, so that magnesium ions do not easily enter a lithium-intercalated slurry by means of an ion exchange membrane, thereby inhibiting the intercalation of the magnesium ions into the lithium intercalation/deintercalation active material; and in a lithium intercalation/deintercalation system, the electrode potential of calcium ions is significantly different from that of lithium ions, so that the calcium ions cannot be intercalated into the lithium intercalation/deintercalation active material. Therefore, the method provided by the present disclosure can effectively separate lithium and magnesium, thereby improving the purity of recovered lithium.
The present disclosure relates to the technical field of battery material preparation, and in particular to a preparation method for a large-particle cobaltosic oxide, comprising the following steps: mixing a cobalt salt solution with a carbonate-containing precipitant solution A, performing solid-liquid separation after reaction, taking solid phase substances, and drying and crushing to obtain amorphous nano cobalt carbonate; mixing a cobalt salt solution with a carbonate-containing precipitant solution B and a carbonate-containing precipitant solution C, generating cobalt carbonate particles after reaction, then adding the amorphous nano cobalt carbonate for reaction to obtain a reaction solution containing a cobalt carbonate matrix coated with the amorphous nano cobalt carbonate; and adding a hydroxyl-containing precipitant solution D into the reaction solution, adding the cobalt salt solution and the precipitant solution D, generating mixed particles after reaction, then performing solid-liquid separation, taking solid phase substances to obtain a cobalt carbonate/cobalt hydroxide mixture, performing primary sintering and then mixing with the amorphous nano cobalt carbonate, and performing secondary sintering to obtain a large-particle cobaltosic oxide.
A coated and modified lithium cobalt oxide, and a preparation therefor and the use thereof. By coating the surface of lithium cobalt oxide with Na, Ni, a rare earth metal and P, the cycling performance and initial efficiency of a lithium cobalt oxide positive electrode material can be improved under a relatively high voltage of 4.2 V or higher, and the comprehensive performance of the material can be improved; moreover, Na and the rare earth metal serving as dual pillars can maintain the structural stability of the surface layer of the material, and the synergistic effect of a sodium salt coating layer and a composite coating layer is more conducive to an improvement in the cycling performance of the material.
H01M 4/36 - Selection of substances as active materials, active masses, active liquids
H01M 4/525 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
H01M 4/58 - Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFySelection of substances as active materials, active masses, active liquids of polyanionic structures, e.g. phosphates, silicates or borates
H01M 4/1391 - Processes of manufacture of electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
67.
METHOD FOR COATING LITHIUM NICKEL COBALT MANGANESE OXIDE CATHODE MATERIAL
The present disclosure discloses a method for coating a lithium nickel cobalt manganese oxide cathode material, and relates to the technical field of the synthesis of cathode materials. The present disclosure provides a method for coating a lithium nickel cobalt manganese oxide cathode material, comprising the following steps: (1) mixing the lithium nickel cobalt manganese oxide cathode material with a potassium permanganate solution, and introducing an olefin; and (2) after a reaction is completed, a reaction product is dried and calcinated to obtain a manganese-dioxide-coated lithium nickel cobalt manganese oxide cathode material; wherein the number of carbon atoms in the olefin is ≤10, and the number of carbon-carbon double bonds in the olefin is 1. By introducing an olefin when mixing a lithium nickel cobalt manganese oxide cathode material with a potassium permanganate solution, directed coating of surface defects is realized.
H01M 4/02 - Electrodes composed of, or comprising, active material
H01M 4/505 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
H01M 4/525 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
68.
NICKEL-COBALT-ALUMINUM TERNARY POSITIVE ELECTRODE MATERIAL PRECURSOR, AND PREPARATION METHOD THEREFOR AND USE THEREOF
The present application belongs to the technical field of lithium ion batteries. Disclosed are a nickel-cobalt-aluminum ternary positive electrode material precursor, and a preparation method therefor and the use thereof. The preparation method for the nickel-cobalt-aluminum ternary positive electrode material precursor comprises the following steps: (1) adding a nickel source, a cobalt source and an aluminum source into deionized water to prepare a mixed solution, adding a complexing agent and a precipitant into the mixed solution for a reaction, carrying out solid-liquid separation, and performing drying to obtain a solid product; and (2) adding the solid product into a modified graphene paste, and carrying out primary ball milling, hydrothermal reaction, secondary ball milling, drying and crushing to obtain the nickel-cobalt-aluminum ternary positive electrode material precursor, the modified graphene paste comprising the following components: a fluorine-containing silane coupling agent, a soluble boron-containing compound, a surfactant, graphene and absolute ethyl alcohol. The prepared nickel-cobalt-aluminum ternary positive electrode material precursor has good structural stability and consistency, thereby remarkably improving the electrical properties and cycle performance of lithium ion batteries.
The present application relates to the technical field of battery recovery. Disclosed is a method for recovering valuable metals from a lithium-ion battery. In the present application, waste rubber particles are used as a fuel and a reducing agent, and after the waste rubber particles and a lithium-ion battery electrode powder are mixed and granulated, primary roasting and pyrolysis and secondary roasting and pyrolysis are conducted; a gas generated by the waste rubber particles has a relatively high heat value, also has an extremely high reducibility, and can reduce a ternary lithium battery electrode powder into soluble lithium oxide; lithium metal can be recovered by means of water leaching, and therefore a metal recovery rate is high and the energy consumption is low; and since the waste rubber particles are used, the resource recycling rate can be increased, and the method is economical and environmentally friendly.
An integrated extraction system and a control method therefor. The integrated extraction system comprises at least an extraction tank and a controller, wherein a first speed reducer (3) for adjusting the stirring of a stirrer and a second speed reducer (6) for adjusting the vertical movement of an aqueous-phase regulating tube are at least mounted in the extraction tank, the stirrer being arranged in a mixing tank (4) of the extraction tank, and the aqueous-phase regulating tube being arranged in a clarification tank (5) of the extraction tank; and the controller is configured to obtain a feed flow rate of the extraction tank, solution information of the clarification tank (5), and the stirring frequency of the stirrer, and perform PID control over the feed flow rate, the stirring frequency, and the position of the aqueous-phase regulating tube on the basis of the feed flow rate, the solution information and the stirring frequency. In this way, it is possible to realize automatic control of the extraction tank, reduce the interference of human factors, and improve the production line stability.
B01D 11/04 - Solvent extraction of solutions which are liquid
71.
METHOD FOR RECOVERING NICKEL, COBALT, MANGANESE, LITHIUM, AND NEGATIVE ELECTRODE GRAPHITE FROM TERNARY LITHIUM BATTERY BY MEANS OF HIGH-PRESSURE REDUCTION
A method for recovering nickel, cobalt, manganese, lithium, and negative electrode graphite from a ternary lithium battery by means of high-pressure reduction, comprising the following steps: carrying out low-acid leaching on waste battery powder, mixing low-acid leaching residues obtained after solid-liquid separation with an alkaline solution to make a slurry, carrying out high-pressure leaching on roasting residues obtained after primary roasting of the slurry, and carrying out secondary roasting on high-pressure leaching residues obtained after solid-liquid separation, thereby obtaining battery-grade graphite powder.
The present invention provides a method for removing PVDF and aluminum from a lithium iron phosphate positive electrode material, comprising the following steps: S1: performing mixing and ball-milling on lithium iron phosphate powder, a first ionic liquid, and ethanol, and performing solid-liquid separation to obtain PVDF-removed lithium iron phosphate powder; and S2: mixing and heating alcohol, a second ionic liquid, and the PVDF-removed lithium iron phosphate powder prepared in step S1, and separating alcohol and aluminum alkoxide to obtain PVDF-removed and aluminum-removed lithium iron phosphate powder, wherein the first ionic liquid and the second ionic liquid in steps S1 and S2 are independently selected from a fluorine-containing ionic liquid.
H01M 10/54 - Reclaiming serviceable parts of waste accumulators
H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodesLithium-ion batteries
H01M 4/58 - Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFySelection of substances as active materials, active masses, active liquids of polyanionic structures, e.g. phosphates, silicates or borates
73.
METHOD FOR FULL-CHAIN INTEGRATED REGENERATION OF WASTE LITHIUM IRON PHOSPHATE POSITIVE ELECTRODE SHEETS, AND REGENERATED LITHIUM IRON PHOSPHATE POSITIVE ELECTRODE SHEET
A method for regeneration of waste lithium iron phosphate positive electrode sheets, and a regenerated lithium iron phosphate positive electrode sheet. By means of an electrochemical mode, the method enables lithium iron phosphate to be regenerated without any damage to the structure thereof; the method avoids the discharge of acid-alkali wastewater in large quantities during a wet recovery process, and also avoids the problem of reduced activity of lithium iron phosphate due to the lattice changes in the lithium iron phosphate caused by aerobic calcination during a pyrogenic recovery process; moreover, the process is simple, lithium iron phosphate does not need to be stripped from positive electrode sheets, a positive electrode sheet is directly obtained after regeneration, and a binder, a conductive agent, etc., in the positive electrode sheet do not need to be additionally replenished; and the performance of a regenerated lithium iron phosphate positive electrode material is equivalent to that of the initially prepared lithium iron phosphate positive electrode material.
A lithium cobalt oxide positive electrode material, a preparation method therefor and the use thereof. The positive electrode material comprises large particles and small particles. The large particles have a lower content of nickel and manganese; a small amount of the nickel element increases the capacity and a small amount of manganese stabilizes the structure; the presence of nickel and manganese inhibits cobalt dissolution to a certain degree, thus improving battery storage; additionally, the slight doping of nickel and manganese enhances intrinsic properties and allows the large particles to normally grow, thus improving the compaction density of an electrode sheet and ensuring the compression resistance. The small particles have a higher content of nickel and manganese; since the small particles have a small size and a larger BET, small particles are likely to grow into quasi-single crystals, so that compared with the slight doping of nickel and manganese, the presence of higher amounts of nickel and manganese is more beneficial for improving the storage and gas generation properties while improving the battery capacity.
H01M 4/36 - Selection of substances as active materials, active masses, active liquids
H01M 4/525 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
An order-to-disorder transformed spinel phase lithium nickel manganese oxide material, a preparation method therefor and a use thereof. A matrix of the spinel phase lithium nickel manganese oxide material is primarily based on an ordered spinel phase, but the surface of the matrix is a surface layer primarily based on a disordered spinel phase. Moreover, there is also a doping element for increasing the degree of disorder and/or promoting single crystallization in the matrix. By introducing the doping element, the content of trivalent manganese in the matrix is increased, so that the internal degree of disorder is increased on the basis of the ordered spinel phase; moreover, single crystal particles of the order-to-disorder transformed spinel phase lithium nickel manganese oxide material are at the micron level, and said material has a small specific surface area and excellent capacity. The surface layer primarily based on the disordered spinel phase can further improve the capacity, cycle performance and rate capability of the order-to-disorder transformed spinel phase lithium nickel manganese oxide material, so that said material has great advantages in subsequent material coating. The order-to-disorder transformed spinel phase lithium nickel manganese oxide material can be widely used in preparation of lithium battery positive electrodes.
H01M 4/525 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
76.
FULL-CHAIN INTEGRATED METHOD FOR RECYCLING LITHIUM FROM BATTERY AND STORING CARBON DIOXIDE
Disclosed herein is a full-chain integrated method for recycling lithium from a battery and storing carbon dioxide. The method comprises the following steps: carrying out electrochemical lithium extraction by using an electrolytic tank, and introducing a gas containing carbon dioxide and hydrogen fluoride into a cathode chamber solution of the electrolytic tank, such that a lithium fluoride precipitate is obtained in an anode chamber, and carbonate wastewater is obtained in the cathode chamber, wherein the electrolytic tank comprises a lithium-rich battery material anode, a lithium-deficient battery material cathode, a monovalent anion exchange membrane, the cathode chamber solution and an anode chamber solution, and the cathode chamber and the anode chamber are separated by using the monovalent anion exchange membrane.
A positive electrode material, and a preparation method therefor and the use thereof. The positive electrode material comprises a substrate material and a coating layer arranged on the surface of the substrate material, wherein a bulk phase of the substrate material is doped with metal M, the near-surface layer of the substrate material is doped with Na in a gradient decreasing mode from outside to inside, and the coating layer comprises a perovskite-structure oxide containing metal Me. The coating layer comprises Me, O and La elements, and a substrate is subjected to bulk phase and near-surface layer gradient doping by using doping elements of specific types and contents, and is subjected to surface coating by using perovskite, such that the problem of structure deterioration under high voltages can be solved, and the gas production of a battery can be improved.
H01M 4/36 - Selection of substances as active materials, active masses, active liquids
H01M 4/525 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
H01M 4/505 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
H01M 4/485 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy
78.
LITHIUM ION BATTERY POSITIVE ELECTRODE MATERIAL, PREPARATION METHOD AND USE
A lithium ion battery positive electrode material, a preparation method and the use. By means of adjustment and optimization of doping elements, the doping amount and the parameters of a preparation process, single crystal or single crystal-like particles are obtained, so as to reduce micro-cracks, and reduce side reactions at interfaces, thus obtaining a lithium-cobalt oxide having good storage performance, cycle performance and gas evolution performance at voltages of 4.50V or above and suitable for the field of power batteries.
H01M 4/36 - Selection of substances as active materials, active masses, active liquids
H01M 4/505 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
H01M 4/525 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
H01M 4/505 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
H01M 4/525 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
H01M 4/485 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy
H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodesLithium-ion batteries
A CTP battery pack disassembly method, comprising: performing a pre-treatment operation on a CTP battery pack to remove an upper cover, an electric control module, and a shielding accessory; performing a discharge operation on the CTP battery pack after the pre-treatment operation on same has been completed; performing an automatic cut-off operation on a busbar connected between two adjacent battery cells in the CTP battery pack; performing a heating operation on a bottom portion of the CTP battery pack; performing a turnover operation on the CTP battery pack after the heating operation on same has been completed; and performing a vibration operation on the CTP battery pack after the turnover operation on same has been completed, to separate each battery cell from the inside of the CTP battery pack. The above-described CTP battery pack disassembly method enables the efficiency of disassembly by workers to be high during disassembly of a CTP battery pack, while also enabling good safety of the workers during disassembly of the CTP battery pack.
A positive electrode material containing a nano aluminum oxide coating layer and a preparation method for the positive electrode material. The method comprises the following steps: adding an aluminum source and a carbon source into a solvent to obtain a dispersion system; adding a positive electrode material into the dispersion system, stirring and carrying out a reaction to obtain a gel; drying the gel and sintering in an inert atmosphere to obtain a precursor; and carrying out heat treatment on the precursor in an oxidizing atmosphere to obtain a positive electrode material containing a nano aluminum oxide coating layer.
A fiber ball filter, comprising: a double-layer pressing plate assembly (3), comprising a first pressing plate (31) and a second pressing plate (32) arranged in sequence. First water-permeable holes (33) are formed in the first pressing plate (31), and second water-permeable holes (34) are formed in the second pressing plate (32). A lifting/lowering control assembly (4) is used for controlling the double-layer pressing plate assembly (3) to move up and down so as to be switched between a working position and a flushing position. The working position is the position of the double-layer pressing plate assembly (3) when a fiber ball filtering member is pressed, and the flushing position is the position of the double-layer pressing plate assembly (3) when the backwashing expansion rate of the fiber ball filtering member is a first preset proportion. A rotation control assembly (5) is connected to the first pressing plate (31), and controls the rotation to adjust the area of the overlapping portion of the first water-permeable holes (33) and the second water-permeable holes (34). According to the fiber ball filter, the backwashing effect of the fiber ball filtering member can be improved, the fiber ball filtering member is prevented from being damaged during backwashing, and the present invention solves the problems of fiber balls being prone to being bonded during lifting of the pressing plates after backwashing of the fiber ball filtering member, and non-uniform distribution of the fiber balls when the fiber ball filtering materials are pressed again.
B01D 24/04 - Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed stationary during the filtration the filtering material being clamped between pervious fixed walls
B01D 24/06 - Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed stationary during the filtration the filtering material being clamped between pervious fixed walls the pervious walls comprising a series of louvres or slots
B01D 24/46 - Regenerating the filtering material in the filter
83.
METHOD OF PREPARING HARD CARBON ANODE MATERIAL AND USE THEREOF
The present invention discloses a method of preparing a hard carbon anode material and use thereof. Starch is mixed with nano-silica, the obtained mixture is heat treated at 150° C. to 240° C. under an inert atmosphere, the obtained first-sintered product is heat treated at 180° C. to 220° C. under an oxygen-containing atmosphere, the second-sintered product is cyclonically separated to remove nano-silica to obtain pre-oxidized starch-based microspheres, and the pre-oxidized starch-based microspheres are performed carbonization treatment under an inert atmosphere to obtain the hard carbon anode material. In the present invention, the silica particles can be adsorbed on the surface of the starch raw material, and cross-linking occurs between the starch molecular chains during the heat treatment process, and under the barrier of the silicon dioxide, the starch particles will not be cross-linked but fused to form a spherical structure. The introduction of oxygen atoms during the pre-oxidation process produces oxygen vacancy and increases the active sites for sodium ion storage after carbonization, thus increasing the reversible capacity of sodium ion batteries.
Provided in the present invention are a decommissioned-traction-battery screening method and system taking carbon emission into consideration. The decommissioned-traction-battery screening method comprises: in response to an input operation of a client, acquiring the carbon emission of each decommissioned traction battery within a current boundary range before decommission; acquiring state-of-health parameters of the decommissioned traction batteries by means of charging and discharging; on the basis of the carbon emission and the state-of-health parameters, classifying the decommissioned traction batteries into several categories; and on the basis of the classification result, determining a disposal mode for each decommissioned traction battery, wherein the disposal mode comprises cascade use and dismantling for recycling. In the present application, state-of-health parameters and the carbon emission of decommissioned traction batteries are taken into consideration during a screening process, and on the basis of the state-of-health parameters and the carbon emission, the batteries are classified into categories, so as to advise the disposal mode of the batteries. Thus, the overall carbon emission of the batteries in the life cycle thereof can be effectively controlled, and the production of a relatively large amount of carbon emissions during the process of cascade use or dismantling for recycling is avoided.
Disclosed is a preparation method for a high-nickel ternary cathode material, including the steps of mixing a LiOH powder with a high-nickel ternary precursor according to a molar ratio of (0.6 to 0.95):1, performing primary sintering in an oxygen atmosphere, adding a metal oxide into a LiOH solution to obtain a mixed solution, mixing the mixed solution with a primary-sintered material in a protective atmosphere, drying and crushing a mixed material, performing secondary sintering on a powder material, spraying an atomized boric acid alcohol solution onto a secondary-sintered material, and then tempering to obtain the high-nickel ternary cathode material.
A method for improving cyclic rising of a battery, and a lithium ion battery. The method comprises: using a preset charging current to carry out constant-current constant-voltage charging on a battery to be tested until the voltage of said battery reaches a rated voltage, and the current of said battery reaches a target cutoff current (S110); and sequentially carrying out constant-current discharging on said battery twice, wherein a method for carrying out constant-current discharging on said battery comprises: standing said battery for a first preset duration; and when standing is finished, carrying out constant-current discharging on said battery until the voltage of said battery reaches a preset cutoff voltage (S120).
H01M 10/48 - Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
87.
AEROGEL INTERFACIAL PHOTOTHERMAL EVAPORATION MATERIAL, AND PREPARATION METHOD THEREFOR AND USE THEREOF
An aerogel interfacial photothermal evaporation material, and a preparation method therefor and the use thereof. The aerogel interfacial photothermal evaporation material comprises graphene, a carbonized ternary precursor and oxide nanoparticles, wherein the graphene coats the surface of the carbonized ternary precursor, and the oxide nanoparticles are loaded on the surface of the carbonized ternary precursor coated with the graphene.
B01J 13/00 - Colloid chemistry, e.g. the production of colloidal materials or their solutions, not otherwise provided forMaking microcapsules or microballoons
C09K 5/14 - Solid materials, e.g. powdery or granular
C02F 1/14 - Treatment of water, waste water, or sewage by heating by distillation or evaporation using solar energy
44 material. By using a ferrate to oxidize organic phosphorus, the ferrate itself is reduced into ferric iron, and provides an iron source and also serves as an oxidizing agent; by introducing humic acid during the oxidation process, a competitive oxidation relationship with the organic phosphorus is formed; the ferrate is activated into an iron-based intermediate having higher oxidizability; and after the humic acid is oxidized, the electronegativity is enhanced, such that iron ions can be adsorbed to play a dispersing role, thereby preventing the generated iron phosphate from being agglomerated, such that the particle size thereof is uniform, which is conductive to improving the electrical properties of the subsequently prepared lithium iron phosphate.
H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodesLithium-ion batteries
H01M 4/58 - Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFySelection of substances as active materials, active masses, active liquids of polyanionic structures, e.g. phosphates, silicates or borates
89.
METHOD FOR RECYCLING POSITIVE ELECTRODE MATERIAL OF WASTE LITHIUM BATTERY BY MEANS OF HIGH-VOLTAGE PULSES
A method for recycling a positive electrode material of a waste lithium battery by means of high-voltage pulses. The method comprises: crushing a waste positive electrode sheet under the synergistic effect of high-voltage pulses and ultraviolet irradiation, wherein a positive electrode material in the waste positive electrode sheet comprises a positive electrode material matrix and a coating layer that is coated on the positive electrode material matrix, and the coating layer comprises titanium dioxide. As the waste positive electrode sheet is crushed by means of the synergism of high-voltage pulses and ultraviolet irradiation, the positive electrode material coated with titanium dioxide can be effectively stripped from a positive electrode current collector, and the stripping rate is significantly improved; and the content of aluminum in the stripped positive electrode material is very low.
A preparation method for a hard carbon negative electrode material. The method comprises the following steps: uniformly mixing a polymer material and a cross-linking agent, so as to obtain a mixture; placing the mixture in an oxygen-free environment and performing primary calcination, so as to obtain a precursor; placing the precursor in an oxygen-containing environment and performing secondary calcination, so as to obtain a modified precursor; and placing the modified precursor in an oxygen-free environment and performing third calcination, so as to obtain a hard carbon negative electrode material. By mixing the polymer material and the cross-linking agent, carrying out primary calcination to achieve cross-linking among polymers, carrying out secondary calcination to introduce an oxygen-containing functional group, and carrying out tertiary calcination and a pore closing treatment, the prepared hard carbon has a disordered interlayer structure, which is beneficial for the intercalation/deintercalation of sodium ions, thereby exhibiting a relatively high reversible capacity and first charge-discharge efficiency. The prepared hard carbon negative electrode material is further applied to a negative electrode of a sodium-ion battery.
A short-process lithium extraction method for a lithium clay ore. The method comprises the following steps: calcining the lithium clay ore to obtain a cured material; dissolving the cured material, concentrated sulfuric acid and an alkali metal sulfate in pure water to perform a hydrothermal reaction, and filtering same to obtain a leachate; adsorbing the leachate with a calcium-magnesium-removal resin column for impurity removal, so as to obtain an impurity-removed solution; and adding a saturated sodium carbonate solution to the impurity-removed liquid, and filtering same to obtain lithium carbonate filter residues. By means of a pressure leaching method, the lithium leaching rate is increased, and Al3+34222 (where X is Na or K). The alunite is insoluble in water and slightly soluble in sulfuric acid, has relatively good crystallinity, less adsorption entrainment of free ions, and almost no lithium entrainment. By using this characteristic of alunite, Al3+ dissolved out from the lithium ore by acid is converted into an alunite precipitate, thereby reducing the Al/Li ratio of the leachate; in addition, a small amount of calcium and magnesium ions are adsorbed by using the calcium-magnesium-removal resin, and finally lithium is collected in the form of lithium carbonate.
A method for preparing a modified nano-tricobalt tetraoxide. The method comprises the following steps: preparing a cobalt salt solution, an alkali solution and a sintering aid; introducing an inert gas into a reaction kettle to replace air in the reaction kettle, such that a reaction is performed in the inert atmosphere, adding the cobalt salt solution and the alkali solution, and mixing and reacting same, so as to obtain a nano-cobalt hydroxide slurry having a water content of 85-90 wt%; subjecting the nano-cobalt hydroxide slurry to filter pressing, so as to obtain a press-dried nano-cobalt hydroxide slurry having a water content of 60-70 wt%; drying the press-dried nano-cobalt hydroxide slurry, so as to obtain a dried nano-cobalt hydroxide slurry having a water content of less than 10 wt%; and oxidizing and crushing the dried nano-cobalt hydroxide slurry, and mixing and modifying same with the sintering aid, so as to obtain modified nano-tricobalt tetraoxide having a water content of less than 1 wt% and a D50 of less than 1 μm. The water content of the nano-cobalt hydroxide slurry is reduced in gradient by means of the two steps of filter pressing and drying; and the sintering temperature is reduced by taking the sintering aid as a catalyst.
The present invention belongs to the technical field of lithium battery preparation. Disclosed is a method for synthesizing a lithium manganese iron phosphate material coated with discontinuous vapor deposition carbon. The method for synthesizing the discontinuous vapor deposition carbon-coated lithium manganese iron phosphate material comprises the following steps: (1) preparing a precursor; (2) carrying out pre-sintering organic carbon coating; (3) carrying out rotary kiln vapor deposition carbon coating; and (4) carrying out crushing and sieving. In the method for synthesizing a lithium manganese iron phosphate material coated with discontinuous vapor deposition carbon, raw materials are selected to prepare a precursor, the precursor is then subjected to two-stage sintering of pre-sintering organic carbon coating and rotary kiln vapor deposition carbon coating, and same is then crushed and sieved to obtain a lithium manganese iron phosphate material coated with discontinuous vapor deposition carbon. The lithium manganese iron phosphate material coated with discontinuous vapor deposition carbon prepared by means of the present synthesis method has a compact and uniform coated carbon layer and has relatively good electronic conductivity.
C01B 25/45 - Phosphates containing plural metal, or metal and ammonium
H01M 4/36 - Selection of substances as active materials, active masses, active liquids
H01M 4/62 - Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
H01M 4/58 - Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFySelection of substances as active materials, active masses, active liquids of polyanionic structures, e.g. phosphates, silicates or borates
C01B 32/05 - Preparation or purification of carbon not covered by groups , , ,
94.
METHOD FOR RECYCLING RAFFINATE ACID IN PROCESS OF WET-PROCESS PURIFICATION PHOSPHORIC ACID PRODUCTION
YICHANG BRUNP YIHUA NEW MATERIAL CO., LTD. (China)
Inventor
Wang, Wei
Wang, Hao
Ruan, Dingshan
Li, Changdong
Zheng, Haiyang
Ding, Daijun
Abstract
The present disclosure belongs to the technical field of battery raw materials. Disclosed is a method for recycling raffinate acid in a process of wet-process purification phosphoric acid production. The method comprises: removing sulfur, fluorine, arsenic and heavy metals in raffinate acid to be treated, so as to obtain pretreated acid; pre-neutralizing the pretreated acid; then performing purification to obtain a purified liquid and precipitate residues containing iron, aluminum and magnesium; and rectifying the purified liquid to obtain industrial-grade phosphoric acid. The method can achieve effective recycling on the phosphorus resource in the raffinate acid, and the produced industrial-grade phosphoric acid can be used as a raw material to prepare battery-grade phosphates.
A method for recovering nickel and cobalt from a lateritic nickel ore. The method comprises the following steps: subjecting lateritic nickel ore to acid leaching, performing solid-liquid separation so as to obtain a leachate, and then sequentially removing iron, aluminum, calcium and magnesium in the leachate, so as to obtain a calcium-and-magnesium-removed solution; subjecting the calcium-and-magnesium-removed solution to adsorption with an ion exchange resin column for nickel adsorption, and then subjecting same to desorption and evaporative crystallization with sulfuric acid, so as to obtain nickel sulfate and adsorption raffinate; and subjecting the adsorption raffinate to adsorption with an ion exchange resin column for cobalt adsorption, and then subjecting same to desorption and evaporative crystallization with sulfuric acid, so as to obtain cobalt sulfate. The method has the advantages of simple process flow, relatively low production cost, stability and reliability.
C22B 3/42 - Treatment or purification of solutions, e.g. obtained by leaching by ion-exchange extraction
C22B 3/24 - Treatment or purification of solutions, e.g. obtained by leaching by physical processes, e.g. by filtration, by magnetic means by adsorption on solid substances, e.g. by extraction with solid resins
96.
SOLID ELECTROLYTE CONTAINING LITHIUM IRON PHOSPHATE COATING LAYER AND PREPARATION METHOD THEREOF
The present invention belongs to the field of solid electrolytes, and specifically relates to a solid electrolyte containing a lithium iron phosphate coating layer and a preparation method therefor. The preparation method comprises the following steps: mixing a lithium resource, a phosphorus resource, a reducing agent and a ferrous resource to obtain a mixed solution; and soaking a solid electrolyte ceramic sheet in the mixed solution for a hydrothermal reaction, so as to obtain a solid electrolyte containing a lithium iron phosphate coating layer.
H01M 10/0561 - Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of inorganic materials only
97.
BORON-DOPED POSITIVE ELECTRODE MATERIAL PRECURSOR, AND PREPARATION METHOD THEREFOR AND USE THEREOF
A boron-doped positive electrode material precursor, and a preparation method therefor and a use thereof. According to the preparation method, a metal hydroxide raw material is directly mixed with a solution containing borate ions, and a heating reaction is implemented to obtain a boron-doped positive electrode material precursor. The method uses the characteristic that the surface and the internal pores of the metal hydroxide are rich in a large amount of active hydroxyl, to cause the metal hydroxide and the hydroxyl of the borate ions to generate weak interaction, thereby enhancing the uniform adsorption of the boron element on the surface and the internal pores, thus obtaining a precursor having an excellent boron doping effect, and avoiding boron salt residues caused by using a boron salt and a ball milling method. Compared with existing coprecipitation methods, the precipitation efficiency of the boron element is greatly improved, and the solution obtained by separation can be recycled as a solution containing borate ions. The boron-doped positive electrode material prepared by using the precursor has good capacity performance and excellent cycle performance.
H01M 4/525 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
H01M 4/505 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
H01M 4/36 - Selection of substances as active materials, active masses, active liquids
H01M 4/525 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
H01M 4/505 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
A method for removing fluorine from a waste lithium battery, comprising the following steps: disassembling a waste lithium battery, carrying out reduction and acid leaching, carrying out solid-liquid separation, and taking a liquid phase to obtain a leachate; carrying out copper removal and aluminum removal on the leachate to obtain an aluminum-removed liquid; adding sodium fluoride into the aluminum-removed liquid to precipitate lithium so as to obtain a lithium-precipitated liquid; and sequentially adding an oxidizing agent and an iron salt solution into the lithium-precipitated liquid, and standing to obtain a fluorine-removed liquid and fluorine removal residue.
Disclosed is a method for removing a manganese element in a nickel-cobalt-manganese-containing solution and a use thereof. A nickel-cobalt-manganese-containing solution is adjusted to be weakly acidic, part of manganese in the solution is oxidized, and then manganese is precipitated in the form of trimanganese tetraoxide; in addition, sodium silicate is used as a dispersant to inhibit further agglomeration or growth of trimanganese tetraoxide particles; and the recovery efficiency and purity of the manganese element are improved in combination with flotation, thereby facilitating the use of a nickel-cobalt-containing solution downstream, and obtaining nickel-cobalt products having higher quality.
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