Abstract

The present disclosure relates to the field of batteries and provides a high-compaction positive electrode material precursor and a preparation method therefor, a positive electrode material, a battery, and a powered device. The high-compaction positive electrode material precursor comprises first-type particles having a particle size less than 5 μm and second-type particles having a particle size greater than or equal to 5 μm, wherein the ratio of the proportion of the number of the first-type particles to the proportion of the number of the second-type particles is (10-40):1. The preparation method for the high-compaction positive electrode material precursor comprises: mixing two or more types of precursor particles to obtain the high-compaction positive electrode material precursor. According to the high-compaction positive electrode material precursor provided by the present disclosure, within appropriate number proportion ranges of particles having different particle sizes in the precursor, the effect of filling gaps between large particles with more small particles is ideal, and when the particle size range of the small particles is appropriate, an overall high compaction density is exhibited.

IPC Classes  ?

• C01G 53/00 - Compounds of nickel
• C01G 53/05 - HydroxidesOxyhydroxides
• H01M 4/52 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron
• H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodesLithium-ion batteries

Abstract

Provided are a sulfur-containing composition, a preparation method therefor and the use thereof, belonging to the field of mining and metallurgy. The sulfur-containing composition comprises a sulfurizing agent and a surface modifier, the surface modifier being loaded on the surface of the sulfurizing agent, the particle size of the surface modifier being less than that of the sulfurizing agent, and the surface modifier comprising an inorganic powder material and/or an organic powder material. The surface of the sulfurizing agent is subjected to modification treatment by using the inorganic powder material and/or the organic powder material as the surface modifier, so as to improve the structural stability of the sulfurizing agent, thus reducing situations such as pulverization, structural deformation and bonding scaling caused by collision, pressing, etc., during conveying of the sulfurizing agent, and further effectively improving the utilization rate of and the conveying efficiency for the sulfurizing agent.

IPC Classes  ?

• B01J 13/04 - Making microcapsules or microballoons by physical processes, e.g. drying, spraying
• C22B 23/02 - Obtaining nickel or cobalt by dry processes
• C22B 5/08 - Dry processes by sulfidesRoasting reaction processes
• C22B 5/12 - Dry processes by gases

Abstract

m+nwxy22O. The preparation method for the polyanionic precursor comprises: using a metal salt containing M and/or M' and a phosphorus source containing pyrophosphate as raw materials of the polyanionic precursor, dissolving the raw materials, mixing same to obtain a mixed solution, implementing a reaction, and carrying out solid-liquid separation to obtain the polyanionic precursor. The polyanionic precursor of the present application has a large specific surface area, and the prepared sodium ion battery positive electrode material has high purity and excellent electrochemical performance.

IPC Classes  ?

• 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 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
• C01B 25/42 - Pyrophosphates

Abstract

qm+nwxy22O. The preparation method for the polyanionic precursor comprises: mixing a metal salt containing M2+ and a first phosphorus source containing pyrophosphate to obtain a mixed solution, and carrying out a reaction to obtain a mixed solution of pyrophosphate containing a divalent metal M; adding an oxidizing agent and a second phosphorus source for reaction, performing solid-liquid separation, and then drying the separated solid, to obtain the polyanionic precursor. The polyanionic precursor of the present application has high tap density, and the prepared sodium ion battery positive material has high purity and excellent electrochemical performance. The polyanionic precursor provided by the present application contains a small amount of insoluble Na, so that a sodium source during the preparation for the positive electrode can be saved.

IPC Classes  ?

• C01B 25/42 - Pyrophosphates
• 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 10/054 - Accumulators with insertion or intercalation of metals other than lithium, e.g. with magnesium or aluminium

Abstract

A sodium-ion battery cathode material precursor and a preparation method therefor, and a sodium-ion battery cathode material, a sodium-ion battery, and an electric device. The sodium-ion battery cathode material precursor comprises a plurality of secondary particles, wherein a growth direction consistency coefficient U forming the secondary particles satisfies: U≥75% and U=(360-α)/360*100%, α being an angle sum of all central angles which do not satisfy a specified condition; in the profile of each secondary particle, the central angle is a central angle that uses the center of a circle of the profile of the secondary particle as a vertex; and the specified condition is that in the profile, primary particles grow in a diameter direction of the profile in an intercalating manner on an outer layer of a sector area corresponding to the central angle. According to the provided sodium-ion battery cathode material precursor, primary particles have a good growth direction consistency, thereby facilitating the diffusion of sodium ions and also improving the material capacity and the rate capability.

IPC Classes  ?

• H01M 4/04 - Processes of manufacture in general
• 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

Abstract

The present disclosure provides a recycling treatment method for low-nickel matte. The method comprises the following steps: an atmospheric leaching process: mixing low-nickel matte with an acid solution, and performing atmospheric leaching to obtain leached ore pulp; and a precipitation process: adding a vulcanizing agent into the leached ore pulp for vulcanization precipitation, carrying out a reaction, and then carrying out solid-liquid separation to obtain a precipitate and an iron-containing post-precipitation liquid. According to the recycling treatment method provided by the embodiments of the present disclosure, the separation difficulty of iron and metals such as nickel, cobalt, and manganese in the low-nickel matte can be reduced, so that the iron is fully separated from metals such as nickel, cobalt, and manganese, and metals such as nickel, cobalt, and manganese form nickel-rich matte with low iron content; and iron forms an iron salt product, facilitating improving the economic value of a recovered product recovered from low-nickel matte.

IPC Classes  ?

• C22B 3/44 - Treatment or purification of solutions, e.g. obtained by leaching by chemical processes
• C22B 23/00 - Obtaining nickel or cobalt
• C22B 23/02 - Obtaining nickel or cobalt by dry processes
• C22B 1/02 - Roasting processes
• C22B 15/00 - Obtaining copper
• C22B 3/06 - Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic acid solutions
• C22B 3/08 - Sulfuric acid
• C22B 3/10 - Hydrochloric acid
• C01G 49/14 - Sulfates

Abstract

(100)(001)(001) of the precursor is 1.90-2.40. The preparation method comprises: adding raw materials including a metal salt solution, a precipitant and a complexing agent into a first base solution, and carrying out a first reaction according to a predetermined procedure until a crystal nucleus is obtained; and adding materials including the metal salt solution, the precipitant, the complexing agent and the crystal nucleus into a second base solution, and carrying out a second reaction according to a predetermined procedure. Raw materials of the lithium-ion battery positive electrode material comprise a precursor of the lithium-ion battery positive electrode material. According to the precursor, the growth of precursor materials on the face (001) is inhibited, so that the crystal face (100) becomes a dominant crystal face, the crystallinity is high, primary particles have good consistency, and the capacity performance and the cycle performance are both considered.

IPC Classes  ?

• 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 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodesLithium-ion batteries
• 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
• C01G 53/00 - Compounds of nickel

Abstract

The present disclosure relates to the technical field of new energy. Provided are cobaltosic oxide and cobalt carbonate and preparation methods therefor, a positive electrode material and a lithium-ion battery. Cobalt carbonate and corresponding cobaltosic oxide secondary particles are integrally subjected to gradient doping with Al, and the Al doping amount of a core layer thereof is higher than that of a coating layer, such that the crystal structure stability of an LCO material is improved, and the cycle performance of a lithium cobaltate battery prepared from a sintered positive electrode material is improved. The cobaltosic oxide comprises a core layer and a coating layer that coats the core layer, wherein the content of cobalt is reduced layer by layer from inside to outside, such that the surface Co4+ content is reduced, the Co dissolution amount is decreased, and the safety performance can be improved. The core layer is a functional layer, takes up a large proportion by volume, has a high cobalt content, and can improve the capacity and the cycle performance; and the coating layer is a modified layer, coats the core layer and is very thin, and the total content of doping elements is increased in a gradient manner, such that the specific performance of the material can be improved, and the comprehensive performance of LCO can be improved.

IPC Classes  ?

• C01G 51/04 - Oxides
• C01G 51/06 - Carbonates
• 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

Abstract

The present disclosure relates to the technical field of new energy. Provided are a positive electrode material precursor for a sodium ion battery, a preparation method therefor, a positive electrode material and a sodium ion battery. The positive electrode material precursor for a sodium ion battery comprises an inner core and an outer shell, inner-core primary particles being disorderedly arranged, and outer-shell primary particles comprising skeleton primary particles staggeredly arranged in the circumferential direction of secondary particles and elongated primary particles filled between the skeleton primary particles. The skeleton primary particles can improve the strength of the secondary particles, so that structural collapse is not liable to occur during sintering processes, thereby maintaining the structure stability. In addition, filling the space in the skeleton with the elongated primary particles can improve the tap density of the precursor, improve the electrochemical properties of the material and increase the battery capacity. Furthermore, the precursor contains a relatively large amount of pores and achieves uniform distribution of elements, which facilitate the infiltration of Na element and other doping elements during sintering processes, thereby lowering sintering temperature.

IPC Classes  ?

• C01G 53/00 - Compounds of nickel
• H01M 4/36 - Selection of substances as active materials, active masses, active liquids
• H01M 10/054 - Accumulators with insertion or intercalation of metals other than lithium, e.g. with magnesium or aluminium

Abstract

The present disclosure provides a method for removing impurities from a crude metal hydroxide leaching slurry and a method for preparing a sulfate, and relates to the technical field of hydrometallurgy. A crude metal hydroxide is subjected to acid leaching. Method I involves: converting ferrous iron in the leaching slurry into ferric iron by adding an oxidizing agent, and reacting a nickel-containing raw material with an acid in the slurry to consume the acid in the slurry and adjust the pH value of the slurry, such that at least one of impurities including manganese, iron, aluminum, calcium, magnesium, copper, chromium and zinc is precipitated, and an impurity-removed liquid containing at least one of nickel and cobalt is obtained, thereby reducing the introduction of calcium impurities, lowering the production cost, and improving the economic benefits. Method II involves: adding a nickel-containing raw material during acid leaching without the need to additionally add a reducing agent or an oxidizing agent, thereby significantly lowering the auxiliary material cost during the MHP leaching process, reducing the introduction of impurity ions in the system, and decreasing the evaporation cost.

IPC Classes  ?

• C22B 23/00 - Obtaining nickel or cobalt
• C22B 3/04 - Extraction of metal compounds from ores or concentrates by wet processes by leaching

Abstract

The present application relates to the field of lithium-ion batteries, and provides a lithium-ion battery positive electrode material precursor and a preparation method therefor, a lithium-ion battery positive electrode material, a lithium-ion battery and an electric device. The lithium-ion battery positive electrode material precursor comprises a plurality of primary particles, one primary particle comprises a plurality of neatly stacked single-sheet layers, and the edges of the single-sheet layers are flat, wherein N is a positive integer, and N is greater than or equal to 2. The preparation method for the lithium-ion battery positive electrode material precursor comprises: introducing raw materials including a nickel-containing metal salt solution, a precipitant and a complexing agent into a base solution for reaction, and during the reaction, controlling the pH value to be 9.8-11.3, the ammonia concentration to be 2-12 g/L, and the concentration of nickel in a supernatant to be 70-350 ppm; and after the reaction, carrying out solid-liquid separation, drying, sieving and demagnetizing to obtain the lithium-ion battery positive electrode material precursor. In the lithium-ion battery positive electrode material precursor, the plurality of single-sheet layers forming the primary particles have the characteristics of high regularity and integrity, and the prepared positive electrode material has higher cycle, capacity and safety.

IPC Classes  ?

• C01G 53/00 - Compounds of nickel
• 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 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodesLithium-ion batteries

Abstract

A positive electrode material precursor and a preparation method therefor, and a positive electrode material and a lithium-ion battery. Primary particles of the positive electrode material precursor comprise a plurality of layers of sheet units, wherein the average number of sheet units is 5-30, and the thickness of a single sheet unit is 5-15 nm. By means of designing a structure, lithium ions are more easily deintercalated and diffused in a positive electrode material, and a conduction rate of the positive electrode material is greatly increased, such that the capacity and cycle performance of the positive electrode material are further enhanced.

IPC Classes  ?

• C01G 53/00 - Compounds of nickel
• H01M 4/52 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron

Abstract

xy1-x-y22, wherein 0.15 ≤ x ≤ 0.35, and 0.2 ≤ y ≤ 0.5. The precursor for sodium-ion battery positive electrode material contains a S element with a content of ≤ 4000 ppm, and has a Na/S mass ratio of ≤ 1.5. By means of the precursor for sodium-ion battery positive electrode material provided by the present invention, the prepared positive electrode material is very good in element uniformity, few in structural defects, controllable in particle size, good in degree of sphericity, and high in energy density. With the retention of the content of trace sulfur impurities, the lower the sodium-sulfur ratio, the better the battery capacity, first efficiency, and cycle performance at the same level of sulfur content.

IPC Classes  ?

• C01G 53/00 - Compounds of nickel
• 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 10/054 - Accumulators with insertion or intercalation of metals other than lithium, e.g. with magnesium or aluminium
• 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

Abstract

The present disclosure relates to the technical field of nickel smelting. Disclosed are a method and apparatus for producing a high-nickel matte from a low-nickel matte. The method comprises: continuously introducing a solid low-nickel matte and silicon dioxide into an oxygen-enriched converting furnace for converting, so as to produce a high-nickel matte, converting slag, and a converting flue gas. The process for producing a high-nickel matte from a low-nickel matte provided by the present disclosure has the advantages of stable flue gas components and a stable flue gas amount.

IPC Classes  ?

• C22B 23/02 - Obtaining nickel or cobalt by dry processes
• C22B 9/05 - Refining by treating with gases, e.g. gas flushing
• C22B 9/10 - General processes of refining or remelting of metalsApparatus for electroslag or arc remelting of metals with refining or fluxing agentsUse of materials therefor
• C22B 9/14 - Refining in the solid state

Abstract

The present application provides a positive electrode material precursor, a preparation method therefor, a positive electrode material, and a lithium ion battery, and relates to the technical field of new energy. The positive electrode material precursor is secondary particles composed of primary particles and is a composite structure comprising an inner layer arranged in a radial shape along the center of the positive electrode material precursor and an outer layer wrapped around the inner layer and formed by flatly laying and stacking lamellar primary particles and arranged in a lamellar shape, wherein the lamellae of the outer layer are perpendicular to the direction of pressure in the compaction process, so that the mechanical strength of the secondary particles of the present application is higher than that of secondary particles in a common radial structure or block structure. After inheriting this structure, the positive electrode material can obtain a higher compaction density than that of a common secondary particle product, and the energy density of the material is significantly improved. In the present application, the inner layer and the outer layer of the secondary particles have different lamellar orientations, and a sintered positive electrode material inherits this characteristic structure. In the charging/discharging cycle, the expansion and contraction directions of the material are different, preventing or reducing the occurrence of cracks causing collapse of the particle structure, and thereby improving the cycle performance.

IPC Classes  ?

• C01G 53/00 - Compounds of nickel
• 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 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodesLithium-ion batteries

Abstract

Provided are ternary positive electrode material precursor and preparation method thereof, ternary positive electrode material, lithium-ion battery, positive electrode, and electric-involved equipment. The precursor includes, sequentially from inside to outside, core layer, first intermediate layer, second intermediate layer, and shell layer. Porosities of core layer, first intermediate layer, and second intermediate layer increase sequentially. Shell layer has the smallest porosity or no porosity. The method includes: performing first reaction of raw materials including nickel-cobalt-manganese ternary metal salt mixed solution, complexing agent, and pH modifier to obtain core layer; performing second reaction to form first intermediate layer on surface of core layer; performing third reaction to form second intermediate layer on surface of first intermediate layer; and performing fourth reaction to form shell layer on surface of second intermediate layer. The ternary positive electrode material includes, sequentially from inside to outside, layer A, layer B, layer C, and layer D.

IPC Classes  ?

• C01G 53/04 - Oxides

Abstract

Provided are ternary positive electrode material precursor and preparation method thereof, positive electrode material, positive electrode slurry, lithium-ion battery, positive electrode thereof, and electrical equipment. The ternary positive electrode material precursor includes core layer, intermediate layer, and shell layer, wherein the porosities of the core layer, the intermediate layer, and the shell layer increase sequentially. The preparation method is mixing raw materials including nickel source, cobalt source, manganese source, a precipitating agent, and a complexing agent; and performing reaction of solution coprecipitation method. The positive electrode material is made of raw materials including the ternary positive electrode material precursor. The positive electrode slurry is made of raw materials including the positive electrode material. The lithium-ion battery positive electrode is made of raw materials including the positive electrode slurry. The lithium-ion battery is made of raw materials including the lithium-ion battery positive electrode. The electrical equipment includes the lithium-ion battery.

IPC Classes  ?

• 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
• C01G 53/00 - Compounds of nickel

Abstract

The present application relates to the technical field of new energy, and particularly, to a ternary positive electrode material, a precursor thereof, and a lithium-ion battery. The ternary positive electrode material and the precursor thereof feature a porous structure and uniformity pore size distribution, which provides a permeation pathway for electrolytes, thereby greatly improving the permeation efficiency of the electrolytes, and facilitating the rapid permeation of the electrolytes into the interior of the material. The present invention features an appropriate porosity, which can prevent remarkable decreases in the tap density and the compaction density while improving the electrochemical performance of the material, thus providing a better volume energy density for the material.

IPC Classes  ?

• C01G 53/00 - Compounds of nickel
• 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 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodesLithium-ion batteries

Abstract

The present application provides a ternary positive electrode material precursor, a preparation method therefor, a ternary positive electrode material, a lithium ion battery as well as a positive electrode, and an electric device. The ternary positive electrode material precursor sequentially comprises, from inside to outside, a core layer, a first intermediate layer, a second intermediate layer and a shell layer, the porosity of the core layer, the porosity of the first intermediate layer and the porosity of the second intermediate layer being sequentially increased, and the shell layer having the minimum porosity or having no hole. The preparation method comprises: performing a first reaction on raw materials comprising a nickel-cobalt-manganese ternary mixed solution, a complexing agent and a pH regulator to obtain a core layer; adjusting the reaction condition, and performing a second reaction to form a first intermediate layer on the surface of the core layer; adjusting the reaction condition, and performing a third reaction to form a second intermediate layer on the surface of the first intermediate layer; and adjusting the reaction condition, and performing a fourth reaction to form a shell layer on the surface of the second intermediate layer. The ternary positive electrode material sequentially comprises, from inside to outside, a layer A, a layer B, a layer C and a layer D. The ternary positive electrode material precursor provided by the present application has excellent properties.

IPC Classes  ?

• 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

Abstract

The present disclosure provides a ternary positive electrode material precursor and a preparation method therefor, a positive electrode material, positive electrode slurry, a lithium ion battery, a positive electrode, and an electric device. The ternary positive electrode material precursor comprises a core layer, a middle layer and a shell layer; the porosities of the core layer, the middle layer and the shell layer increase sequentially. The preparation method comprises: mixing raw materials comprising a nickel source, a cobalt source, a manganese source, a precipitant and a complexing agent, and reacting by means of a solution coprecipitation method. Raw materials of the positive electrode material comprise the ternary positive electrode material precursor. The positive electrode slurry, wherein raw materials thereof comprise the positive electrode material. The lithium ion battery positive electrode, wherein raw materials thereof comprise lithium ion battery positive electrode slurry. The lithium ion battery, wherein raw materials thereof comprise the lithium ion battery positive electrode. The electric device, comprising the lithium ion battery. According to the ternary positive electrode material precursor and the positive electrode material provided by the present disclosure, due to the special distribution of pores, the structure of the material can be stabilized, the generation of cracks can be ameliorated, and the phase transformation in a cycle process can be inhibited, thereby prolonging the service life, and improving the cycle performance and rate capability of the material.

IPC Classes  ?

• C01G 53/00 - Compounds of nickel
• 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

Abstract

A smelting furnace for smelting a nickel matte and a production method for a low nickel matte. The smelting furnace comprises: a first region (1) for melting and slagging an object to be smelted; a second region (2) for carrying out reduction and sulfidation on the object subjected to melting and slagging in the first region (1), so as to generate a target product; and a third region (3) for separating the target product, wherein the first region (1), the second region (2) and the third region (3) are communicated with each other, and a partition wall (7) is provided between the first region (1) and the second region (2) to separate the first region (1) and the second region (2); the smelting furnace comprises a first furnace body (20) and a second furnace body (30) which are independent of each other; the first furnace body (20) and the second furnace body (30) are arranged corresponding to the first region (1) and the second region (2); uptake flues for jointly discharging smoke are provided above the first region (1) and the second region (2).

IPC Classes  ?

• F27B 14/04 - Crucible or pot furnacesTank furnaces adapted for treating the charge in vacuum or special atmosphere
• F27B 14/20 - Arrangement of controlling, monitoring, alarm or like devices
• F27D 17/00 - Arrangements for using waste heatArrangements for using, or disposing of, waste gases
• C22B 23/02 - Obtaining nickel or cobalt by dry processes

Abstract

The present disclosure discloses a method for producing low nickel matte by the smelting, reduction and sulfidation of nickel oxide ore. The method mainly comprises: drying and preheating nickel oxide ore to produce hot nickel oxide ore of a temperature of 600 to 900°C; continuously adding the dried and preheated nickel oxide ore and flux into a molten pool of a smelting furnace; spraying a reducing agent, a sulfidizing agent and oxygen-enriched air into a reaction zone of the molten pool in the smelting furnace, and controlling an oxygen excess coefficient α of the oxygen-enriched air to the reducing agent to be 0.3 to 0.4; and controlling the temperature in the furnace to be 1400 to 1550°C, so that the materials added in the furnace undergo a reduction and sulfidation reaction in a molten state to produce low nickel matte and slag. The described method is used for smelting nickel oxide ore, and has the characteristics of good environmental protection, a short process flow, strong adaptability of raw materials, low production costs, etc.

IPC Classes  ?

• C22B 5/10 - Dry processes by solid carbonaceous reducing agents
• C22B 5/08 - Dry processes by sulfidesRoasting reaction processes
• C22B 23/02 - Obtaining nickel or cobalt by dry processes