# US 12,119,489 B2 · Positive electrode active material for nonaqueous electrolyte secondary batteries comprising nickel-containing lithium transition metal oxide, nonaqueous electrolyte secondary battery comprising same, and method for producing positive electrode active material for nonaqueous electrolyte secondary batteries comprising nickel-containing lithium transition metal oxide

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- Number: US 12,119,489 B2
- Document ID: US12119489B2
- Status: Granted
- Kind: B2
- Application number: 16/757,100
- Filed: 2019-02-07
- Published: 2020-10-29
- Granted: 2024-10-15
- Earliest claimed: 2018-02-28
- Assignees: Panasonic Intellectual Property Management Co., Ltd.
- Applicants: Panasonic Intellectual Property Management Co., Ltd.
- Inventors: Hidekazu Hiratsuka
- Web page: https://patentgrep.com/patent/US12119489B2

## 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
- 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 4/485: of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy (H01M4/505, H01M4/525 take precedence)
- 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 2002/60: Compounds characterised by their crystallite size
- C01P 2002/72: by d-values or two theta-values, e.g. as X-ray diagram
- C01P 2004/03: obtained by SEM
- C01P 2004/61: Micrometer sized, i.e. from 1-100 micrometer
- C01P 2004/62: Submicrometer sized, i.e. from 0.1-1 micrometer
- 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

A positive electrode active material for nonaqueous electrolyte secondary batteries includes a Ni-containing lithium transition metal oxide in the form of secondary particles formed by the aggregation of primary particles of the oxide, the proportion of Ni in the lithium transition metal oxide being not less than 80 mol % relative to the total number of moles of metal element(s) except Li, the average particle size of the primary particles being not less than 0.5 μm, the average particle size of the secondary particles being not less than 8 μm, the lithium transition metal oxide having a Ni disorder of not more than 3% and a crystallite size in the range of 100 to 200 nm according to X-ray diffractometry.

## Claims

### Claim 1

A positive electrode active material for nonaqueous electrolyte secondary batteries comprising a Ni-containing lithium transition metal oxide in form of secondary particles formed by aggregation of primary particles of the oxide,
the proportion of Ni in the lithium transition metal oxide being not less than 80 mol % relative to the total number of moles of metal element(s) except Li,
the average particle size of the primary particles being in the range of 0.5 μm to 2 μm,
the average particle size of the secondary particles being not less than 8 μm,
the lithium transition metal oxide having a Ni disorder in the range of 1% to 2% and a crystallite size in the range of 100 to 200 nm according to X-ray diffractometry.

### Claim 2 (depends on 1)

The positive electrode active material for nonaqueous electrolyte secondary batteries according to claim 1, wherein the average particle size of the secondary particles is in the range of 8 to 20 μm.

### Claim 3 (depends on 1)

The positive electrode active material for nonaqueous electrolyte secondary batteries according to claim 1, wherein the lithium transition metal oxide includes at least one element selected from Co, Mn, Mg, Zr, Mo, W, Al, Cr, V, Ce, Ti, Fe, K, Ga and In.

### Claim 4 (depends on 1)

The positive electrode active material for nonaqueous electrolyte secondary batteries according to claim 1, wherein the lithium transition metal oxide includes at least one of Co and Mn and further includes at least one element selected from Mg, Zr, Mo, W, Al, Cr, V, Ce, Ti, Fe, K, Ga and In.

### Claim 5 (depends on 1)

A nonaqueous electrolyte secondary battery comprising a positive electrode including a positive electrode active material, a negative electrode and a nonaqueous electrolyte,
the positive electrode active material comprising the positive electrode active material for nonaqueous electrolyte secondary batteries described in claim 1.

### Claim 6 (depends on 1)

The positive electrode active material for nonaqueous electrolyte secondary batteries according to claim 1, wherein
the average particle size of the secondary particles is in the range of 10 μm to 18 μm.