# US 12,191,487 B2 · Positive active material for nonaqueous electrolyte secondary battery, method for producing positive active material for nonaqueous electrolyte secondary battery, positive electrode for nonaqueous electrolyte secondary battery, nonaqueous electrolyte secondary battery, and energy storage apparatus

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- Number: US 12,191,487 B2
- Document ID: US12191487B2
- Status: Granted
- Kind: B2
- Application number: 17/636,268
- Filed: 2020-07-03
- Published: 2022-09-15
- Granted: 2025-01-07
- Earliest claimed: 2019-08-26
- Assignees: GS Yuasa International Ltd.
- Applicants: GS Yuasa International Ltd.
- Inventors: Daisuke Yoshikawa; Shinya Otani
- Web page: https://patentgrep.com/patent/US12191487B2

## CPC

- C01G 53/82: Compounds containing nickel, with or without oxygen or hydrogen, and containing two or more other elements
- 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 53/502: containing lithium and cobalt
- 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
- 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 2002/76: by a space-group or by other symmetry indications
- H01M 2004/021: {Physical characteristics, e.g. porosity, surface area}
- H01M 2004/028: {Positive electrodes}
- Y02E 60/10: Energy storage using batteries
- 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)
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- 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

Provided is a positive active material for a nonaqueous electrolyte secondary battery which contains a lithium transition metal composite oxide, the lithium transition metal composite oxide having an α-NaFeO2 structure, containing Ni, Co and Mn as a transition metal (Me), and having an X-ray diffraction pattern attributable to a space group R3-m, in which a ratio of the full width at half maximum of a diffraction peak of the (003) plane to the full width at half maximum of a diffraction peak of the (104) plane, (003)/(104) at a Miller index hkl in X-ray diffraction measurement using a CuKα ray is 0.810 to 0.865, and a crystallite size is 410 Å or more.

## Claims

### Claim 1

A positive active material for a nonaqueous electrolyte secondary battery, comprising a lithium transition metal composite oxide, the lithium transition metal composite oxide having an α-NaFeO2 structure, containing Ni, Co and Mn as a transition metal (Me), and having an X-ray diffraction pattern attributable to a space group R3-m, wherein a ratio of the full width at half maximum of a diffraction peak of the (003) plane to the full width at half maximum of a diffraction peak of the (104) plane, (003)/(104) at a Miller index hkl in X-ray diffraction measurement using a CuKα ray is 0.810 to 0.865, and a crystallite size is 410 Å or more.

### Claim 2 (depends on 1)

The positive active material for a nonaqueous electrolyte secondary battery according to claim 1, wherein a molar ratio Ni/Me of Ni to the Me is 0.35 to 0.6.

### Claim 3 (depends on 1)

The positive active material for a nonaqueous electrolyte secondary battery according to claim 1, wherein the lithium transition metal composite oxide has a total pore volume of 5.0 mm3/g or more.

### Claim 4 (depends on 1)

A method for producing the positive active material for a nonaqueous electrolyte secondary battery according to claim 1, the method comprising: supplying an aqueous solution containing halogen ions, ammonium ions, and Ni, Co and Mn as transition metals (Me) to a reaction tank; preparing a carbonate precursor containing Ni, Co and Mn; and firing a mixture of the carbonate precursor with a lithium compound to obtain a lithium transition metal composite oxide.

### Claim 5 (depends on 1)

A positive electrode for a nonaqueous electrolyte secondary battery, comprising the positive active material according to claim 1.

### Claim 6 (depends on 5)

A nonaqueous electrolyte secondary battery comprising the positive electrode according to claim 5, a negative electrode, and a nonaqueous electrolyte.

### Claim 7 (depends on 6)

An energy storage apparatus comprising a plurality of the nonaqueous electrolyte secondary batteries according to claim 6.