ZHEJIANG YANYI NEW ENERGY TECHNOLOGY CO., LTD. (China)
Inventor
Liu, Jun
Huang, Mianbin
Liang, Huaqing
Abstract
A water-soluble binder, a battery electrode sheet and the use thereof. The water-soluble binder comprises a copolymer. Polymeric monomers of the copolymer comprise a combination of a double-bond-containing nitrile monomer, a double-bond-containing amide monomer, a double-bond-containing carboxylic acid monomer, optionally a double-bond-containing sulfonic acid monomer and optionally a fifth monomer. The water-soluble binder is in the form of powder, and the mass percentage content of the copolymer in the water-soluble binder is greater than or equal to 92%. By means of the design of the polymeric monomers and the copolymer and the combination of the copolymer and the powder form, the water-soluble binder has excellent binding power, and can effectively inhibit the volume expansion of an electrode sheet during charge and discharge cycles, thereby improving the cycle performance of the electrode sheet and a lithium-ion battery.
C08F 228/02 - Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a bond to sulfur or by a heterocyclic ring containing sulfur by a bond to sulfur
C08F 220/18 - Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
H01M 4/62 - Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
H01M 4/13 - Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulatorsProcesses of manufacture thereof
2.
MODIFIED LITHIUM IRON(III) OXIDE MATERIAL, PREPARATION METHOD THEREFOR AND USE THEREOF
A modified lithium iron(III) oxide material, a preparation method therefor and a use thereof. The modified lithium iron(III) oxide material comprises a nickel-doped lithium iron(III) oxide substrate, and a thin layer of an iron-nickel lithium oxide and a carbon coating layer sequentially stacked on a surface of the nickel-doped lithium iron(III) oxide substrate, the thin layer of iron-nickel lithium oxide being generated in situ on the surface of the nickel-doped lithium iron(III) oxide substrate. In the modified lithium iron(III) oxide material, the molar ratio of elemental lithium to elemental iron is 5:(0.9-1.1), the molar ratio of elemental nickel to elemental lithium is (0.01-0.05):5, and the carbon coating amount is 0.5-5wt%. The modified lithium iron(III) oxide material comprises a unique nickel-iron-lithium oxide thin layer, which significantly improves the stability of the lithium iron(III) oxide material, can reduce or inhibit the generation of residual alkali, and has excellent lithium replenishment performance.
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
3.
POLYMER COATING MATERIAL, PREPARATION METHOD THEREFOR, AND USE THEREOF
The present application provides a polymer coating material, a preparation method therefor, and a use thereof. The polymer coating material comprises a combination of a polymer and a conductive material; the polymer contains an active group; the active group comprises a combination of a cyano group, a hydroxyl group, and a strongly hydrophilic group; and the strongly hydrophilic group comprises an amino group and/or a carboxyl group. The polymer coating material has excellent hydrophilicity and conductivity, and is used as a negative electrode active material modifier. On the one hand, the polymer coating material can improve the hydrophilicity of a negative electrode active material, improve the dispersity of the negative electrode active material in a negative electrode slurry, and improve the wettability and the electrolyte adsorption efficiency of a negative electrode sheet to an electrolyte; and on the other hand, the polymer coating material can inhibit the volume expansion of the negative electrode active material, and improve the conductivity to obtain a modified negative electrode active material having excellent hydrophilicity, dispersity, cycle performance, high capacity, and rate performance, thereby improving the production efficiency and the use performance of a lithium ion battery.
The present invention relates to the technical field of battery materials. Provided are an ultrathin lithium negative electrode and a preparation method therefor, and a lithium metal battery. The ultrathin lithium negative electrode comprises a substrate, a first functional layer and a lithium alloy layer, wherein the first functional layer contains an effective component I, and the first functional layer is arranged between the substrate and the lithium alloy layer. The provision of the first functional layer facilitates the formation of the lithium alloy layer, and enables the lithium alloy layer to be well attached to a surface of the substrate, thereby realizing uniform distribution of lithium; moreover, such a manner in which the substrate, the first functional layer and the lithium alloy layer are arranged facilitates the regulation and control of the thickness of the lithium alloy layer to make the thickness thereof not exceed 70 μm, such that ultrathinness can be really achieved, thereby laying a foundation for the construction of a high-specific-energy lithium metal battery; in addition, by means of the matching between the substrate, the first functional layer and the lithium alloy layer, the ultrathin lithium negative electrode not only has a smooth surface, but also has obvious reversibility and the function of preventing lithium dendrites. Further provided in the present invention is a preparation method for the ultrathin lithium negative electrode.
A lithium bis(fluorosulfonyl)imide, a preparation method therefor and an application thereof, wherein iminodisulfonic acid is synthesized by using sulfur trioxide and ammonia as raw materials, the iminodisulfonic acid is chlorinated by means of thionyl chloride to obtain bis(chlorosulfonyl)imide, and then fluorination and lithiation are performed in sequence to obtain the lithium bis(fluorosulfonyl)imide. The method has excellent yield and purity; and compared with a traditional process, the method has the advantages of simple raw materials, less generation of three wastes, green environmental protection, fewer side reactions, low cost and the like, and is easy to industrialize.
Disclosed are lithium difluoro-bis(oxalate)phosphate, a preparation method therefor, and an application thereof. The preparation method comprises the following steps: (1) mixing oxalyl chloride and lithium hexafluorophosphate with a nonaqueous solvent, adding siloxane, and reacting to obtain a lithium difluoro-bis(oxalate)phosphate solution; and (2) adding a poor solvent into the lithium difluoro-bis(oxalate)phosphate solution for crystallization treatment to obtain the lithium difluoro-bis(oxalate)phosphate. According to the present application, raw materials such as lithium hexafluorophosphate, oxalyl chloride, and hexamethyldisiloxane are used for preparing the difluoro-bis(oxalate)phosphate, and the method of the present application is few in side reaction, few in impurities, high in product purity, and suitable for industrial production.
The present invention relates to a multi-layer lithium metal battery negative electrode, and a preparation method and preparation device therefor. The multi-layer lithium metal battery negative electrode comprises a current collector, a lithium metal layer, a fast ion conductor layer and a functional protection layer. The present invention also relates to a method for preparing the multi-layer lithium metal battery negative electrode, the method characterized by comprising the following steps: (1) a step of evaporating a lithium metal; (2) a step of evaporating a fast ion conductor; and (3) a step of coating a protective material and a polymer solid electrolyte. In addition, the present invention relates to a device for preparing the multi-layer lithium metal battery negative electrode. The multi-layer lithium metal battery negative electrode of the present invention utilizes the composite synergistic effect of the lithium metal layer, the fast ion conductor layer and the functional protection layer, such that the cycling performance, cycling life and safety performance of a lithium metal battery are significantly improved, and the problem of a lithium dendrite appearing in a lithium metal negative electrode is solved.
A battery adhesive, a preparation method therefor, and a lithium-ion battery. The battery adhesive comprises the following components in parts by weight: 70-90 parts of a first component and 10-30 parts of a second component; wherein the preparation raw materials of the first component comprise isocyanate, a first monomer, and a second monomer; the first monomer is selected from an aromatic dihydric phenol and/or an aromatic diamine; the second monomer is a reactive long carbon chain polymer; and the second component is an acrylonitrile copolymer. The battery adhesive has a relatively low swelling rate and relatively strong bonding capabilities in an electrolyte, resulting in better electrical performance in a prepared lithium ion battery.
1 2 3 6 5 5 is a group containing a hydroxyl group at an end group. The water-based binder provided in the present invention has good bonding performance, can significantly inhibit the expansion of a silicon negative electrode, and at the same time allow the prepared pole piece to have excellent flexibility, thereby improving the cycle performance of the battery.
Lithium difluorophosphate, a preparation method therefor, and an application thereof. Lithium hexafluorophosphate and silicon tetrachloride are utilized to generate lithium difluorotetrachloro phosphate, then lithium difluorotetrachloro phosphate reacts with lithium carbonate to obtain a mixture of lithium difluorophosphate and lithium chloride, and then the mixture is purified to obtain high-purity lithium difluorophosphate. The method has simple steps, low cost, short reaction time, and a high conversion rate.
Disclosed are a hexafluorophosphate, phosphorus pentafluoride, a preparation method therefor and an application thereof. The preparation method for the hexafluorophosphate comprises the following steps: mixing a phosphoric acid solution of phosphorus pentoxide, sulfur trioxide and a fluoride in an inert gas atmosphere, sequentially performing evaporation concentration, dissolution, filtration and drying after the reaction, and obtaining the hexafluorophosphate. The method for preparing phosphorus pentafluoride from the hexafluorophosphate obtained by the preparation method provided by the present application comprises the following steps: mixing the hexafluorophosphate and a catalyst solution, carrying out catalytic reaction, and sequentially performing condensation, pressurized liquefaction and adsorption-based impurity removal, and obtaining phosphorus pentafluoride. The present application does not use phosphorus pentafluoride as a raw material to prepare the hexafluorophosphate, and does not use hydrogen fluoride as a raw material to produce phosphorus pentafluoride, thereby reducing risk related to production safety. Meanwhile, widely available chemical reagents of phosphorus pentoxide and sulfur trioxide are used as raw materials, thereby reducing the raw material cost and facilitating large-scale industrial production.
Disclosed in the present disclosure are a water-based binder, and a preparation method therefor and the use thereof. The water-based binder is a copolymer formed by reacting a polymer metal salt with a polymerizable monomer, wherein the polymerizable monomer comprises a combination of an acrylate monomer and an olefin monomer, and the polymer metal salt is any one or a combination of at least two selected from a phosphoric acid metal salt polymer, a carboxyl metal salt polymer, a sulfonic acid metal salt polymer or a bis-sulfonimide metal salt polymer. In the present application, by means of the design and cooperative interaction of structural units such as a polymer metal salt and a polymerizable monomer, a resulting copolymer chain segment comprises specific repeated structural units, such that the water-based binder has an appropriate swelling characteristic, good bonding properties and lithium-ion conductivity, also has good bonding strength, bonding stability and electrochemical performance, and significantly improves the cycle performance and rate performance of a lithium-ion battery comprising same.
The present invention relates to a method and device for preparing an ultrathin metal lithium foil. With regard to the problems of lithium preparation processes in the prior art having a high lithium preparation reaction temperature, a low lithium recovery rate, low purity in collected lithium foils, a complicated process operation, etc., the present invention provides a method for preparing an ultrathin metal lithium foil, wherein firstly, a complex lithium salt is prepared, the complex lithium salt and a reducing agent are then subjected to a vacuum thermal reduction reaction so as to generate a metal vapor, the metal vapor is then subjected to vacuum distillation, and finally, vacuum evaporation is used to prepare the ultrathin metal lithium foil of the present invention. In the present invention, by precisely regulating and controlling conditions such as the formulation of the complex lithium salt, the thermal reduction reaction temperature, the temperature of a distillation device, the vacuum degree, materials and the reducing agent, vacuum reduction, vacuum distillation and vacuum evaporation are continuously performed, and lithium preparation, distillation purification, and evaporation can thus be continuously performed, thereby improving the efficiency of the production of the ultrathin metal lithium foil and saving on preparation costs.
A binder and a preparation method therefor, an electrode plate and a secondary battery. The binder comprises an imide polymer, first conductive fibers, second conductive fibers and conductive particles, wherein the first conductive fibers have reactive groups, and the reactive groups and the imide polymer undergo a chemical reaction to generate chemical bonds; and the average diameter of the second conductive fibers is not less than 0.3 µm, and the average length of the second conductive fibers is not less than 10 µm. The binder provided in the present invention can not only effectively reduce the resistance of the electrode plate so as to improve the conductivity of the electrode plate, but can also ameliorate the cracking problem of a thick electrode plate and improve the coating surface density of the plate so as to improve the energy density of a battery.
Disclosed are a battery binder, a preparation method therefor, and an application thereof. The battery binder comprises a block copolymer composed of a block A and a block B, wherein raw materials for preparation of the block A comprise an aromatic diisocyanate and an aromatic diamine, and raw materials for preparation of the block B comprise an aliphatic diisocyanate and an aliphatic diamine. The battery binder has excellent binding performance and flexibility, and can ensure that a prepared battery electrode sheet has excellent mechanical performance, so that a further prepared battery has excellent electrical performance; and the preparation method for the battery binder is simple and is mild in preparation conditions, and is thus suitable for large-scale industrialization.
A lithium-ion battery positive electrode lithium supplement additive, a preparation method, and a lithium-ion battery are provided. The additive has an Li2NiO2 purity that is greater than 95%, a total residual alkali less than 3%, an initial charge gram capacity of 420-465 mAh/g, and an irreversible capacity of 260-340 mAh/g. The method includes: preparing a composite lithium salt, mixing the composite lithium salt with a nickel source, sintering and crushing same, and obtaining the lithium-ion battery positive electrode lithium supplement additive. The additive is added to a positive electrode active material of the positive electrode of the lithium-ion battery. The Li2NiO2 obtained has a purity of greater than 95%, the total residual alkali is less than 3%, the initial charge gram capacity is 420-465 mAh/g, and the irreversible capacity is 260-340 mAh/g.
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
H01M 4/131 - Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
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
Disclosed are a hexafluorophosphate, phosphorus pentafluoride, a preparation method therefor and an application thereof. The preparation method for the hexafluorophosphate comprises the following steps: mixing a phosphoric acid solution of phosphorus pentoxide, sulfur trioxide and a fluoride in an inert gas atmosphere, sequentially performing evaporation concentration, dissolution, filtration and drying after the reaction, and obtaining the hexafluorophosphate. The method for preparing phosphorus pentafluoride from the hexafluorophosphate obtained by the preparation method provided by the present application comprises the following steps: mixing the hexafluorophosphate and a catalyst solution, carrying out catalytic reaction, and sequentially performing condensation, pressurized liquefaction and adsorption-based impurity removal, and obtaining phosphorus pentafluoride. The present application does not use phosphorus pentafluoride as a raw material to prepare the hexafluorophosphate, and does not use hydrogen fluoride as a raw material to produce phosphorus pentafluoride, thereby reducing risk related to production safety. Meanwhile, widely available chemical reagents of phosphorus pentoxide and sulfur trioxide are used as raw materials, thereby reducing the raw material cost and facilitating large-scale industrial production.
01 - Chemical and biological materials for industrial, scientific and agricultural use
Goods & Services
lithium; carbon for use in rechargeable and storage batteries; sulfuric acid for batteries; lithia being lithium oxide; metallic oxides; non-metallic oxides; anti-frothing solutions for batteries being anti-sulphurizing agents; acidulated water for recharging batteries; salts for galvanic cells; liquids for removing sulfates from batteries being anti-sulphurizing agents; antivulcanization agent for batteries being antisulphurizing agents; battery electrolytes; industrial chemicals; epoxy resins, unprocessed; brazing preparations being brazing chemicals; adhesives for industrial purposes; unprocessed polyimide resins, being unprocessed polymer resins; biochemical catalysts
19.
LITHIUM SULFIDE FOR SOLID ELECTROLYTE, AND PREPARATION METHOD THEREFOR AND USE THEREOF
H01M 4/38 - Selection of substances as active materials, active masses, active liquids of elements or alloys
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
20.
COATED SULFIDE SOLID ELECTROLYTE AND PREPARATION METHOD THEREFOR AND USE THEREOF
The present invention relates to the field of solid batteries, and specifically to a coated sulfide solid electrolyte and a preparation method therefor and the use thereof. Provided is a coated sulfide solid electrolyte, which is a coated sulfide solid electrolyte having an oxide solid electrolyte layer covering the surfaces of sulfide solid electrolyte particles. A specific oxide solid electrolyte is coated on the surface of a sulfide solid electrolyte to obtain the coated sulfide solid electrolyte. The oxide solid electrolyte layer thereof has a relatively high ion conductivity and a high chemical stability, and is insensitive to moisture in the air, and has a good electrochemical stability and inhibits the formation of space charges when mixed with high voltage anode materials, which successfully solves the problems of poor water stability of sulfide solid electrolytes and the mismatch of electrochemical windows when sulfide solid electrolytes are mixed with anode materials.
A lithium bis(fluorosulfonyl)imide, a preparation method therefor and an application thereof, wherein iminodisulfonic acid is synthesized by using sulfur trioxide and ammonia as raw materials, the iminodisulfonic acid is chlorinated by means of thionyl chloride to obtain bis(chlorosulfonyl)imide, and then fluorination and lithiation are performed in sequence to obtain the lithium bis(fluorosulfonyl)imide. The method has excellent yield and purity; and compared with a traditional process, the method has the advantages of simple raw materials, less generation of three wastes, green environmental protection, fewer side reactions, low cost and the like, and is easy to industrialize.
Disclosed are lithium difluoro-bis(oxalate)phosphate, a preparation method therefor, and an application thereof. The preparation method comprises the following steps: (1) mixing oxalyl chloride and lithium hexafluorophosphate with a non-aqueous solvent, adding siloxane, and reacting to obtain a lithium difluoro-bis(oxalate)phosphate solution; and (2) adding a poor solvent into the lithium difluoro-bis(oxalate)phosphate solution for crystallization treatment to obtain the lithium difluoro-bis(oxalate)phosphate. According to the present application, raw materials such as lithium hexafluorophosphate, oxalyl chloride, and hexamethyldisiloxane are used for preparing the difluoro-bis (oxalate)phosphate, and the method of the present application is few in side reaction, few in impurities, high in product purity, and suitable for industrial production.
Lithium difluorophosphate, a preparation method therefor, and an application thereof. Lithium hexafluorophosphate and silicon tetrachloride are utilized to generate lithium difluorotetrachloride phosphate, then lithium difluorotetrachloride phosphate reacts with lithium carbonate to obtain a mixture of lithium difluorophosphate and lithium chloride, and then the mixture is purified to obtain high-purity lithium difluorophosphate. The method has simple steps, low cost, short reaction time, and a high conversion rate.
The present invention relates to a multi-layer lithium metal battery negative electrode, and a preparation method and preparation device therefor. The multi-layer lithium metal battery negative electrode comprises a current collector, a lithium metal layer, a fast ion conductor layer and a functional protection layer. The present invention also relates to a method for preparing the multi-layer lithium metal battery negative electrode, the method characterized by comprising the following steps: (1) a step of evaporating a lithium metal; (2) a step of evaporating a fast ion conductor; and (3) a step of coating a protective material and a polymer solid electrolyte. In addition, the present invention relates to a device for preparing the multi-layer lithium metal battery negative electrode. The multi-layer lithium metal battery negative electrode of the present invention utilizes the composite synergistic effect of the lithium metal layer, the fast ion conductor layer and the functional protection layer, such that the cycling performance, cycling life and safety performance of a lithium metal battery are significantly improved, and the problem of a lithium dendrite appearing in a lithium metal negative electrode is solved.
A positive electrode aqueous binder for a lithium-ion battery, and a preparation method therefor, characterized in that the binder is formed by the copolymerization of an ethylenically unsaturated monomer and a flexible aqueous emulsion, wherein the ethylenically unsaturated monomer contains an ethylenically unsaturated carboxylic acid or an ethylenically unsaturated carboxylic anhydride, an ethylenically unsaturated nitrile-based monomer, and an ethylenically unsaturated hydrophilic monomer, which does not contain a nitrile group and a carboxyl; and the flexible aqueous emulsion contains water and flexible polymer latex particles. A positive electrode slurry prepared from the binder has good viscosity stability; a positive electrode plate prepared therefrom has a high peel strength and good flexibility under high-compaction density; and the lithium-ion battery prepared therefrom has a high cycle capacity retention rate, i.e., high cycle performance.
C08F 259/08 - Macromolecular compounds obtained by polymerising monomers on to polymers of halogen containing monomers as defined in group on to polymers containing fluorine
C08F 261/00 - Macromolecular compounds obtained by polymerising monomers on to polymers of oxygen-containing monomers as defined in group
C08F 255/00 - Macromolecular compounds obtained by polymerising monomers on to polymers of hydrocarbons as defined in group
C08F 271/00 - Macromolecular compounds obtained by polymerising monomers on to polymers of nitrogen-containing monomers as defined in group
C08F 289/00 - Macromolecular compounds obtained by polymerising monomers on to macromolecular compounds not provided for in groups
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
26.
METHOD AND DEVICE FOR PREPARING ULTRATHIN METAL LITHIUM FOIL
The present invention relates to a method and device for preparing an ultrathin metal lithium foil. With regard to the problems of lithium preparation processes in the prior art having a high lithium preparation reaction temperature, a low lithium recovery rate, low purity in collected lithium foils, a complicated process operation, etc., the present invention provides a method for preparing an ultrathin metal lithium foil, wherein firstly, a complex lithium salt is prepared, the complex lithium salt and a reducing agent are then subjected to a vacuum thermal reduction reaction so as to generate a metal vapor, the metal vapor is then subjected to vacuum distillation, and finally, vacuum evaporation is used to prepare the ultrathin metal lithium foil of the present invention. In the present invention, by precisely regulating and controlling conditions such as the formulation of the complex lithium salt, the thermal reduction reaction temperature, the temperature of a distillation device, the vacuum degree, materials and the reducing agent, vacuum reduction, vacuum distillation and vacuum evaporation are continuously performed, and lithium preparation, distillation purification, and evaporation can thus be continuously performed, thereby improving the efficiency of the production of the ultrathin metal lithium foil and saving on preparation costs.
2222222 obtained has a purity of greater than 95%, the total residual alkali is less than 3%, the initial charge gram capacity is 420-465 mAh/g, and the irreversible capacity is 260-340 mAh/g. The preparation method is simple, easy to control, low in cost, and environmentally friendly, and facilitates industrial production.
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
