# US 10,122,012 B2 · Positive electrode active material for lithium-ion battery, a positive electrode for lithium-ion battery, and lithium-ion battery

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- Number: US 10,122,012 B2
- Document ID: US10122012B2
- Status: Granted
- Kind: B2
- Application number: 15/131,362
- Filed: 2016-04-18
- Published: 2016-08-11
- Granted: 2018-11-06
- Earliest claimed: 2010-12-03
- Assignees: JX Nippon Mining & Metals Corporation
- Applicants: JX Nippon Mining & Metals Corporation
- Inventors: Shunsuke Kobayashi; Yoshio Kajiya
- Web page: https://patentgrep.com/patent/US10122012B2

## CPC

- 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 4/0471: {involving thermal treatment, e.g. firing, sintering, backing particulate active material, thermal decomposition, pyrolysis}
- 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 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
- Y02E 60/10: Energy storage using batteries
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

The present invention provides a positive electrode active material for lithium ion batteries having excellent battery property. The positive electrode active material for lithium ion batteries is represented by composition formula: LixNi1−yMyO2+α, wherein M is Co as an essential component and at least one species selected from a group consisting of Sc, Ti, V, Cr, Mn, Fe, Cu, Zn, Ga, Ge, Al, Bi, Sn, Mg, Ca, B and Zr, 0.9≤x≤1.2, 0<y≤0.7, α>0.05, and an average particle size (D50) is 5 μm to 15 μm.

## Claims

### Claim 1

A manufacturing method for a positive electrode active material for lithium ion batteries, represented by composition formula: LixNi1−yMyO2+α, wherein
M is Co as an essential component and at least one species selected from a group consisting of Sc, Ti, V, Cr, Mn, Fe, Cu, Zn, Ga, Ge, Al, Bi, Sn, Mg, Ca, B and Zr, 0.9≤x≤1.2, 0<y≤0.7, α>0.05, and
an average particle size (D50) is 5 μm to 15 μm,
comprising the steps of (1) to (5):
(1) producing metal salt solution of Ni and at least one species selected from a group consisting of Sc, Ti, V, Cr, Mn, Fe, Co, Cu, Zn, Ga, Ge, Al, Bi, Sn, Mg, Ca, B and Zr,
(2) suspending lithium carbonate in pure water, and then pouring the metal salt solution in the water to produce metal carbonate solution slurry,
(3) filtering the metal carbonate solution slurry to produce a filtered lithium-containing carbonate, and then drying the lithium-containing carbonate to produce powders of a precursor for positive electrode active material for lithium ion batteries,
(4) classifying the powders of a precursor for positive electrode active material for lithium ion batteries to produce powders having a particle size of 1 μm to 30 μm, and
(5) conducting a calcination of the powders of a precursor for positive electrode active material for lithium ion batteries having a particle size of 1 μm to 30 μm to produce a positive electrode active material for lithium ion batteries.

### Claim 2 (depends on 1)

The manufacturing method of claim 1, wherein the average particle size (D50) is 7 μm to 13 μm.

### Claim 3 (depends on 1)

The manufacturing method of claim 1, wherein M is Co and Mn.

### Claim 4 (depends on 1)

The manufacturing method of claim 1, wherein α>0.15.

### Claim 5 (depends on 4)

The manufacturing method of claim 4, wherein α>0.20.

### Claim 6 (depends on 1)

The manufacturing method of claim 1, wherein D90 is 20 μm or less in particle size distribution.