# US 12,191,482 B2 · Electrode active material and preparation method thereof, electrode, battery, and apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,191,482 B2 - Document ID: US12191482B2 - Status: Granted - Kind: B2 - Application number: 18/424,845 - Filed: 2024-01-28 - Published: 2024-06-06 - Granted: 2025-01-07 - Earliest claimed: 2020-09-10 - Assignees: Contemporary Amperex Technology (Hong Kong) Limited - Applicants: Contemporary Amperex Technology (Hong Kong) Limited - Inventors: Chengdu Liang; Yongchao Liu; Na Liu; Yingjie Guan; Qisen Huang; Wei Fu - Web page: https://patentgrep.com/patent/US12191482B2 ## CPC - H01M 4/366: {as layered products} - C01G 53/504: with the molar ratio of nickel with respect to all the metals other than alkali metals higher than or equal to 0.5, e.g. Li(MzNixCoyMn1-x-y-z)O2 with x ≥ 0.5 - C01G 53/506: with the molar ratio of nickel with respect to all the metals other than alkali metals higher than or equal to 0.8, e.g. Li(MzNixCoyMn1-x-y-z)O2 with x ≥ 0.8 - H01M 4/0471: {involving thermal treatment, e.g. firing, sintering, backing particulate active material, thermal decomposition, pyrolysis} - H01M 4/131: Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx - H01M 4/1391: of electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx - H01M 4/505: of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy - H01M 4/525: of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy - H01M 4/5825: {Oxygenated metallic salts or polyanionic structures, e.g. borates, phosphates, silicates, olivines} - H01M 4/62: Selection of inactive substances as ingredients for active masses, e.g. binders, fillers - C01P 2004/51: Particles with a specific particle size distribution - Y02E 60/10: Energy storage using batteries - H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY - C01G: COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F (metal hydrides {monoborane, diborane or addition complexes thereof} C01B6/00; salts of oxyacids of halogens C01B11/00; peroxides, salts or peroxyacids C01B15/00; thiosulfates, dithionites, polythionates C01B17/64; compounds containing selenium, or tellurium C01B19/00; binary compounds of nitrogen with metals C01B21/06; azides C01B21/08; {compounds containing nitrogen, other non-metals and metal C01B21/082}; metal amides C01B21/092; nitrites C01B21/50; {compounds of noble gases C01B23/0005}; phosphides C01B25/08; salts of oxyacids of phosphorus C01B25/16; carbides C01B32/90; compounds containing silicon C01B33/00; compounds containing boron C01B35/00; compounds having molecular sieve properties but not having base-exchange properties C01B37/00; compounds having molecular sieve and base-exchange properties, e.g. crystalline zeolites, C01B39/00; cyanides C01C3/08; salts of cyanamide C01C3/16; thiocyanates C01C3/20) - C01P: INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract The present invention relates to an electrode active material, a preparation method thereof, an electrode, a battery, and an apparatus. The electrode active material includes: a core and a coating layer, where the core includes a ternary material, the coating layer coats the core, the coating layer includes a reaction product of a sulfur-containing compound and a lithium-containing compound, and the reaction product includes element Li, element S, and element O. ## Claims ### Claim 1 An electrode active material comprising: a core comprising a ternary material selected from the group consisting of lithium nickel cobalt manganese oxide, lithium nickel cobalt aluminum oxide, and a combination thereof; and a coating layer disposed on at least part of a surface of the core, wherein the coating layer is formed by curing a solution disposed on the surface of the core, the solution comprises an organic sulfur-containing compound, and the coating layer is a reaction product of the organic sulfur-containing compound and comprises Li, S, and O, wherein the organic sulfur-containing compound comprises one selected from the group consisting of mercaptan, thiophenol, thioether, thioaldehyde, thioketone, thiocarboxylic acid, sulfoxide, sulfone, sulfur oxoacid, a derivative of sulfur oxoacid, and any combination thereof. ### Claim 2 (depends on 1) The electrode active material according to claim 1, wherein the sulfur oxoacid is selected from the group consisting of sulfonic acid, sulfinic acid, sulfenic acid, and any combination thereof. ### Claim 3 (depends on 1) The electrode active material according to claim 1, wherein the derivative of sulfur oxoacid is selected from the group consisting of an ester of the sulfur oxoacid, an acyl halide of the sulfur oxoacid, an amide of the sulfur oxoacid, and a lithium amide salt of the sulfur oxoacid, and any combination thereof. ### Claim 4 (depends on 1) The electrode active material according to claim 1, wherein the organic sulfur-containing compound is selected from the group consisting of R1-S(═O)2—R2, R1-C(═S)—R2, R1-C—S—C—R2, or R1-S(═O)2—LiN—S(═O)2—R2, wherein R1 and R2 are each independently selected from the group consisting of hydroxyl, amino, C1-6 alkyl, aryl, halogen, and hydrogen. ### Claim 5 (depends on 4) The electrode active material according to claim 4, wherein the organic sulfur-containing compound comprises R1-S(═O)2—R2, wherein R1 is hydroxyl, and R2 is selected from the group consisting of amino, C1-6 alkyl, and halogen. ### Claim 6 (depends on 4) The electrode active material according to claim 4, wherein the organic sulfur-containing compound comprises R1-C(═S)—R2, wherein R1 is hydroxyl, and R2 is selected from the group consisting of amino, C1-6 alkyl, and halogen. ### Claim 7 (depends on 4) The electrode active material according to claim 4, wherein the organic sulfur-containing compound comprises wherein R1 and R2 each are hydrogen or C1-6 alkyl. ### Claim 8 (depends on 4) The electrode active material according to claim 4, wherein the organic sulfur-containing compound comprises R1-C—S—C—R2, wherein R1 and R2 each are hydrogen or C1-6 alkyl. ### Claim 9 (depends on 4) The electrode active material according to claim 4, wherein the organic sulfur-containing compound comprises R1-S(═O)2—LiN—S(═O)2—R2, where R1 and R2 each are halogen. ### Claim 10 (depends on 1) The electrode active material according to claim 1, wherein the organic sulfur-containing compound further comprises one selected from the group consisting of sulfamide, aminomethanesulfonic acid, lithium bisfluorosulfonimide, thio-propionamide, thio-isobutyramide, propylene sulfide, methyl ethyl sulfide, and any combination thereof. ### Claim 11 (depends on 1) The electrode active material according to claim 1, wherein the solution further comprises a lithium containing compound selected from the group consisting of Li2O, LiOH and Li2CO3, LiNO3, LiPF6, lithium oxalate, lithium acetate, LiCIO4, LiBF4, LiCF3SO3, LiAsF6, LiAlCl4, LIN(CF3SO2)2, LiC(SO2CF3)3, and any combination thereof. ### Claim 12 (depends on 1) The electrode active material according to claim 1, wherein a weight content of S in the electrode active material is 500-5000 ppm. ### Claim 13 (depends on 1) The electrode active material according to claim 1, wherein the solution further comprises a boron-containing compound, the reaction product further comprises B, and a weight content of B in the electrode active material is 500-3000 ppm. ### Claim 14 (depends on 1) The electrode active material according to claim 1, wherein the solution further comprises a phosphorus-containing compound, the reaction product further comprises P, and a weight content of element P in the electrode active material is 200-1500 ppm. ### Claim 15 (depends on 1) The electrode active material according to claim 1, wherein the solution further comprises a fluorine-containing compound, the reaction product further comprises F, and a weight content of element F in the electrode active material is 500-3000 ppm. ### Claim 16 (depends on 1) The electrode active material according to claim 1, wherein a chemical formula of the lithium nickel cobalt manganese oxides is LixNiaCobMncM1 (1-a-b-c)O2, wherein 0.5≤x≤1.2, 0.3