# US 12,002,956 B2 · Precursor particle for preparation of cathode active material for secondary battery and novel precursor powder containing same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,002,956 B2 - Document ID: US12002956B2 - Status: Granted - Kind: B2 - Application number: 17/606,819 - Filed: 2019-09-25 - Published: 2022-11-24 - Granted: 2024-06-04 - Earliest claimed: 2019-04-30 - Assignees: L&F Co., Ltd. - Applicants: L&F Co., Ltd. - Inventors: Sung Kyun Chang; Sang Hoon Jeon; Sunhong Park; Doe Hyoung Kim - Web page: https://patentgrep.com/patent/US12002956B2 ## CPC - 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 10/052: Li-accumulators - 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 4/36: Selection of substances as active materials, active masses, active liquids - H01M 4/366: {as layered products} - H01M 4/505: 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 electrodes; Lithium-ion batteries - C01P 2002/50: Solid solutions - C01P 2002/85: by XPS, EDX or EDAX data - C01P 2004/03: obtained by SEM - C01P 2004/32: Spheres - C01P 2004/45: Aggregated particles or particles with an intergrown morphology - C01P 2004/84: one phase coated with the other - C01P 2006/11: Powder tap density - C01P 2006/40: Electric properties - H01M 2004/028: {Positive electrodes} - 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 Disclosed are novel precursor particles for preparing a cathode active material including transition metal precursor particles containing one or more transition metals, and one or more of an alkali metal and an alkaline earth metal, wherein the alkali metal and the alkaline earth metal are contained in one or more of inner and outer parts of the transition metal precursor particles, and a novel precursor powder including the novel precursor particles. ## Claims ### Claim 1 A novel precursor particle for preparing a cathode active material comprising: a transition metal precursor particle containing one or more transition metals; and one or more of an alkali metal and an alkaline earth metal, wherein the alkali metal and the alkaline earth metal are contained in one or more of inner and outer parts of the transition metal precursor particle, and the novel precursor particle has a composition represented by the following Formula 1: [(1-x-y)A2CO3*xAOH*yA2O]/[(1-a-b)M(OH)2*aMOOH*bM(OH1-c)2] (1) wherein 00; A is at least one alkali metal and/or alkaline earth metal; and M comprises one or more transition metals stable in a tetracoordinate or hexacoordinate structure. ### Claim 2 (depends on 1) The novel precursor particle according to claim 1, wherein the alkali metal comprises one or more of Li (lithium) and Na (sodium). ### Claim 3 (depends on 1) The novel precursor particle according to claim 1, wherein the novel precursor particle is a secondary granule formed by aggregation between a plurality of primary particles. ### Claim 4 (depends on 1) The novel precursor particle according to claim 1, wherein the novel precursor particle has a spherical shape. ### Claim 5 (depends on 1) The novel precursor particle according to claim 1, wherein the alkali metal or alkaline earth metal is present in at least one of the following states: (a) coating the surface of the primary particles and/or secondary granules; (b) present in the voids between the primary particles; and (c) present in the inner part of primary particles and/or secondary granules. ### Claim 6 (depends on 1) The novel precursor particle according to claim 1, wherein the molar ratio (A/M) of total alkali metal and/or alkaline earth metal (A) to total transition metal (M) is more than 0 and is not more than 1.5. ### Claim 7 (depends on 1) A novel precursor powder comprising the novel precursor particle for preparing a cathode active material according to claim 1. ### Claim 8 (depends on 7) The novel precursor powder according to claim 7, wherein the molar ratio (A/M) of total alkali metal and/or alkaline earth metal (A) to total transition metal (M) is more than 0 and is not more than 1.5. ### Claim 9 (depends on 4) The novel precursor powder according to claim 4, wherein the molar ratio (A/M) of total alkali metal and/or alkaline earth metal (A) to total transition metal (M) is more than 0 and is not more than 1.5. ### Claim 10 A novel precursor particle for preparing a cathode active material comprising: a transition metal precursor particle containing one or more transition metals; and one or more of an alkali metal and an alkaline earth metal, wherein the alkali metal and the alkaline earth metal are contained in one or more of inner and outer parts of the transition metal precursor particle, and the novel precursor particle has a composition of the following Formula 2: [(1-x-y)A2CO3*xAOH*yA2O]/MO2-a (2) wherein 00; A is at least one alkali metal and/or alkaline earth metal; and M comprises one or more transition metals stable in a tetracoordinate or hexacoordinate structure. ### Claim 11 (depends on 10) The novel precursor particle according to claim 10, wherein the molar ratio (A/M) of total alkali metal and/or alkaline earth metal (A) to total transition metal (M) is more than 0 and is not more than 1.5. ### Claim 12 (depends on 10) The novel precursor particle according to claim 10, wherein the alkali metal comprises one or more of Li (lithium) and Na (sodium). ### Claim 13 (depends on 10) The novel precursor particle according to claim 10, wherein the novel precursor particle is a secondary granule formed by aggregation between a plurality of primary particles. ### Claim 14 (depends on 10) The novel precursor particle according to claim 10, wherein the novel precursor particle has a spherical shape. ### Claim 15 (depends on 10) The novel precursor particle according to claim 10, wherein the alkali metal or alkaline earth metal is present in at least one of the following states: (a) coating the surface of the primary particles and/or secondary granules; (b) present in the voids between the primary particles; and (c) present in the inner part of primary particles and/or secondary granules. ### Claim 16 (depends on 10) A novel precursor powder comprising the novel precursor particle for preparing a cathode active material according to claim 10. ### Claim 17 (depends on 16) The novel precursor powder according to claim 16, wherein the molar ratio (A/M) of total alkali metal and/or alkaline earth metal (A) to total transition metal (M) is more than 0 and is not more than 1.5. ### Claim 18 (depends on 14) The novel precursor powder according to claim 14, wherein the molar ratio (A/M) of total alkali metal and/or alkaline earth metal (A) to total transition metal (M) is more than 0 and is not more than 1.5.