# US 10,122,017 B2 · Composite active material, solid battery and producing method for composite active material

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 10,122,017 B2
- Document ID: US10122017B2
- Status: Granted
- Kind: B2
- Application number: 15/419,601
- Filed: 2017-01-30
- Published: 2017-08-31
- Granted: 2018-11-06
- Earliest claimed: 2016-02-26
- Assignees: Toyota Jidosha Kabushiki Kaisha
- Applicants: Toyota Jidosha Kabushiki Kaisha
- Inventors: Masahiro Iwasaki
- Web page: https://patentgrep.com/patent/US10122017B2

## 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
- H01M 4/043: {involving compressing or compaction}
- H01M 4/366: {as layered products}
- 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 10/0562: Solid materials
- 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 2004/021: {Physical characteristics, e.g. porosity, surface area}
- H01M 2300/0068: inorganic
- H01M 2300/0071: Oxides
- 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 main object of the present disclosure is to provide a composite active material with a capability of improving a battery output. The present disclosure achieves the object by providing a composite active material comprising: an oxide active material, an oxide solid electrolyte layer that coats a surface of the oxide active material, and a sulfide solid electrolyte layer that coats a surface of the oxide solid electrolyte layer; wherein the sulfide solid electrolyte layer has a specific surface area in a range of 1.06 m2/g to 1.22 m2/g, and a thickness the sulfide solid electrolyte layer is in a range of 15 nm to 25 nm.

## Claims

### Claim 1

A composite active material comprising an oxide active material, an oxide solid electrolyte layer that coats a surface of the oxide active material, and a sulfide solid electrolyte layer that coats a surface of the oxide solid electrolyte layer, wherein
the sulfide solid electrolyte layer has a specific surface area in a range of 1.06 m2/g to 1.22 m2/g, and a thickness of the sulfide solid electrolyte layer is in a range of 15 nm to 25 nm.

### Claim 2 (depends on 1)

A solid battery comprising a cathode active material layer, an anode active material layer, and a solid electrolyte layer formed between the cathode active material layer and the anode active material layer, wherein
either the cathode active material layer or the anode active material layer contains the composite active material according to claim 1.

### Claim 3 (depends on 1)

The composite active material of claim 1, wherein said sulfide solid electrolyte layer has a specific surface area of 1.08 m2/g or more.

### Claim 4 (depends on 1)

The composite active material of claim 1, wherein said sulfide solid electrolyte layer has a specific surface area of 1.18 m2/g or less.

### Claim 5 (depends on 1)

The composite active material of claim 1, wherein said sulfide solid electrolyte layer coats 90% or more of a surface of said oxide solid electrolyte layer.

### Claim 6 (depends on 1)

The composite active material of claim 1, wherein said sulfide solid electrolyte material includes an ion conductor containing Li, A and S, where A is at least one selected from the group consisting of P, Si, Ge, Al, and B.

### Claim 7 (depends on 1)

The composite active material of claim 1, wherein said oxide solid electrolyte layer includes an oxide active material having the formula Lix My Oz, where M is a transition metal; x=0.02 to 2.2; y=1 to 2; and z=1.4 to 4.