# US 12,119,487 B2 · Positive electrode material and battery

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- Number: US 12,119,487 B2
- Document ID: US12119487B2
- Status: Granted
- Kind: B2
- Application number: 17/391,050
- Filed: 2021-08-02
- Published: 2021-11-18
- Granted: 2024-10-15
- Earliest claimed: 2019-02-28
- Assignees: Panasonic Intellectual Property Management Co., Ltd.
- Applicants: Panasonic Intellectual Property Management Co., Ltd.
- Inventors: Masashi Sakaida; Izuru Sasaki; Norihito Fujinoki
- Web page: https://patentgrep.com/patent/US12119487B2

## CPC

- H01M 4/505: of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
- H01M 4/0407: {by coating on an electrolyte layer}
- H01M 4/131: Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
- H01M 4/366: {as layered products}
- 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 4/62: Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M 10/052: Li-accumulators
- H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
- H01M 10/0562: Solid materials
- H01M 2004/028: {Positive electrodes}
- H01M 2300/0068: inorganic
- H01M 2300/008: Halides
- 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

A positive electrode material includes a positive electrode active material, a cover layer that covers at least part of a surface of the positive electrode active material and that contains a first solid electrolyte material, and a second solid electrolyte material that is a material different from the first solid electrolyte material. The first solid electrolyte material contains Li, M, and X and does not contain sulfur. M represents at least one element selected from the group consisting of metal elements other than Li and semi-metal elements, and X represents halogen elements including Cl.

## Claims

### Claim 1

A positive electrode material comprising:
a positive electrode active material;
a cover layer that covers at least part of a surface of the positive electrode active material and that contains a first solid electrolyte material; and
a second solid electrolyte material that is a material different from the first solid electrolyte material,
wherein the first solid electrolyte material contains Li, M, and X and does not contain sulfur,
M represents Y and at least one element selected from the group consisting of semi-metal elements and metal elements other than Li and Y, and
X represents halogen elements including Cl.

### Claim 2 (depends on 1)

The positive electrode material according to claim 1,
wherein the first solid electrolyte material is denoted by Composition formula (1) below,
LiαMβXγ Formula (1)
and herein, each of α, β, and γ represents a value greater than 0.

### Claim 3 (depends on 2)

The positive electrode material according to claim 2,
wherein 2.7≤α≤3, 1≤β≤1.1, and γ=6 are satisfied.

### Claim 4 (depends on 1)

The positive electrode material according to claim 1,
wherein the second solid electrolyte material contains Li, M′, and X′,
M′ is at least one element selected from the group consisting of metal elements other than Li and semi-metal elements, and
X′ represents halogen elements including at least one element selected from the group consisting of Br and I.

### Claim 5 (depends on 4)

The positive electrode material according to claim 4, wherein the second solid electrolyte material is denoted by Composition formula (2) below,
Liα′M′β′X′β′ Formula (2)
and herein, each of α′, β′, and γ′ represents a value greater than 0.

### Claim 6 (depends on 4)

The positive electrode material according to claim 4,
wherein X includes Cl and at least one element selected from the group consisting of Br and I, and
A<B is satisfied, and herein, a molar ratio of a total of Br and I included in X to X is denoted as A and a molar ratio of a total of Br and I included in X′ to X is denoted as B.

### Claim 7 (depends on 1)

The positive electrode material according to claim 1, wherein X does not include Br.

### Claim 8 (depends on 4)

The positive electrode material according to claim 4,
wherein X and X′ include Br, and
C<D is satisfied, and herein, a molar ratio of Br included in X to X is denoted as C and the molar ratio of Br included in X′ to X is denoted as D.

### Claim 9 (depends on 4)

The positive electrode material according to claim 4, wherein M′ includes yttrium.

### Claim 10 (depends on 4)

The positive electrode material according to claim 4, wherein X′ includes Cl and at least one element selected from the group consisting of Br and I.

### Claim 11 (depends on 1)

The positive electrode material according to claim 1, wherein the second solid electrolyte material is a sulfide solid electrolyte.

### Claim 12 (depends on 11)

The positive electrode material according to claim 11,
wherein the sulfide solid electrolyte contains lithium sulfide and phosphorus sulfide.

### Claim 13 (depends on 11)

The positive electrode material according to claim 11,
wherein the sulfide solid electrolyte is Li2S—P2S5.

### Claim 14 (depends on 1)

The positive electrode material according to claim 1, wherein the positive electrode active material is lithium-nickel-cobalt manganese oxide.

### Claim 15 (depends on 1)

The positive electrode material according to claim 1, wherein the positive electrode active material and the second solid electrolyte material are separated from each other by the first solid electrolyte material and are not in direct contact with each other.

### Claim 16 (depends on 1)

A battery comprising:
a positive electrode containing the positive electrode material according to claim 1;
a negative electrode; and
an electrolyte layer disposed between the positive electrode and the negative electrode.

### Claim 17 (depends on 16)

The battery according to claim 16,
wherein the electrolyte layer contains the same material as the first solid electrolyte material or the second solid electrolyte material.

### Claim 18 (depends on 17)

The battery according to claim 17, wherein the electrolyte layer contains the same material as the first solid electrolyte material.

### Claim 19 (depends on 16)

The battery according to claim 16, wherein the electrolyte layer contains a halide solid electrolyte different from the first solid electrolyte material.

### Claim 20 (depends on 19)

The battery according to claim 19, wherein the electrolyte layer contains a halide solid electrolyte different from the first solid electrolyte material and the second solid electrolyte material.

### Claim 21 (depends on 16)

The battery according to claim 16, wherein the electrolyte layer contains a sulfide solid electrolyte.

### Claim 22 (depends on 4)

The positive electrode material according to claim 4, wherein M′ is Y and at least one element selected from the group consisting of semi-metal elements and metal elements other than Li and Y.

### Claim 23

A positive electrode material comprising:
a positive electrode active material;
a cover layer that covers at least part of a surface of the positive electrode active material and that contains a first solid electrolyte material; and
a second solid electrolyte material that is a material different from the first solid electrolyte material,
wherein the first solid electrolyte material contains Li, M, and X and does not contain sulfur,
M represents at least one element selected from the group consisting of metal elements other than Li and semi-metal elements, and
X represents halogen elements including Cl and at least one element selected from the group consisting of Br and I.

### Claim 24 (depends on 23)

A battery comprising:
a positive electrode containing the positive electrode material according to claim 23;
a negative electrode; and
an electrolyte layer disposed between the positive electrode and the negative electrode.