# US 12,113,198 B2 · Positive electrode for nonaqueous electrolyte secondary batteries, and nonaqueous electrolyte secondary battery

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- Number: US 12,113,198 B2
- Document ID: US12113198B2
- Status: Granted
- Kind: B2
- Application number: 17/426,045
- Filed: 2019-12-18
- Published: 2022-04-14
- Granted: 2024-10-08
- Earliest claimed: 2019-01-31
- Assignees: Panasonic Intellectual Property Management Co., Ltd.
- Applicants: Panasonic Intellectual Property Management Co., Ltd.
- Inventors: Youichirou Uka; Rie Matsuoka
- Web page: https://patentgrep.com/patent/US12113198B2

## CPC

- H01M 4/131: Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
- H01M 4/0404: {by coating on electrode collectors}
- H01M 4/133: Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
- 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 4/621: {Binders}
- H01M 4/622: {being polymers}
- H01M 4/623: {fluorinated polymers}
- H01M 4/625: {Carbon or graphite}
- H01M 50/107: having curved cross-section, e.g. round or elliptic (H01M50/103, H01M50/109, H01M50/11 take precedence)
- H01M 2004/027: {Negative electrodes}
- 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
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

This positive electrode for nonaqueous electrolyte secondary batteries is provided with a collector and a mixture layer that is formed on the collector. The mixture layer comprises: a lithium transition metal oxide that contains more than 50% by mole of Ni relative to the total number of moles of metal elements other than Li; a carbon material; a polymer compound that is soluble in N-methyl-2-pyrrolidone, while having a ring structure in each repeating unit; and a polyoxyethylene amine compound.

## Claims

### Claim 1

A positive electrode for a nonaqueous electrolyte secondary battery, comprising:
a collector; and
a mixture layer formed on the collector, wherein
the mixture layer comprises:
a lithium transition metal oxide that contains more than 50% by mole of Ni relative to the total number of moles of metal elements other than Li;
a carbon material;
a polymer compound that is soluble in N-methyl-2-pyrrolidone and has a ring structure in a repeating unit; and
a polyoxyethylene amine compound,
wherein the mixture layer contains the polyoxyethylene amine compound in a range of 1 to 50% by mass relative to a mass of the carbon material.

### Claim 2 (depends on 1)

The nonaqueous electrolyte secondary battery positive electrode according to claim 1, wherein
the ring structure of the polymer compound is a 5 or more membered ring structure.

### Claim 3 (depends on 1)

The nonaqueous electrolyte secondary battery positive electrode according to claim 1, wherein
the polymer compound has a weight average molecular weight in a range of 10,000 to 2,000,000.

### Claim 4 (depends on 1)

The nonaqueous electrolyte secondary battery positive electrode according to claim 1, wherein
the polymer compound comprises at least one of a cellulose polymer compound or a vinyl polymer compound.

### Claim 5 (depends on 1)

The nonaqueous electrolyte secondary battery positive electrode according to claim 1, wherein
the mixture layer contains the polymer compound in a range of 1 to 50% by mass relative to a mass of the carbon material.

### Claim 6 (depends on 1)

The nonaqueous electrolyte secondary battery positive electrode according to claim 1, wherein
the polyoxyethylene amine compound comprises polyoxyethylene alkylamino ether.

### Claim 7 (depends on 1)

A nonaqueous electrolyte secondary battery comprising:
the positive electrode according to claim 1;
a negative electrode: and
a nonaqueous electrolyte.