# US 2021/0280901 A1 · Solid Electrolyte, Method For Producing Solid Electroylyte, And Composite Body

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

- Number: US 2021/0280901 A1
- Document ID: US20210280901A1
- Status: Published application
- Kind: A1
- Application number: 17/192,944
- Filed: 2021-03-05
- Published: 2021-09-09
- Earliest claimed: 2020-03-06
- Assignees: Seiko Epson Corporation
- Applicants: Seiko Epson Corporation
- Inventors: Hitoshi YAMAMOTO; Tsutomu TERAOKA; Tomofumi YOKOYAMA
- Web page: https://patentgrep.com/patent/US20210280901A1

## CPC

- H01M 10/0562: Solid materials
- C01G 33/006: {Compounds containing niobium, with or without oxygen or hydrogen, and containing two or more other elements}
- C01G 35/006: {Compounds containing tantalum, with or without oxygen or hydrogen, and containing two or more other elements}
- C01P 2002/52: containing elements as dopants
- C01P 2004/60: Particles characterised by their size
- C01P 2004/61: Micrometer sized, i.e. from 1-100 micrometer
- C01P 2006/40: Electric properties
- H01M 2300/0071: Oxides
- Y02E 60/10: Energy storage using batteries
- Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- 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)
- 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
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

A solid electrolyte according to the present disclosure is represented by the following compositional formula (1). Li7-x(La3-zYz)(Zr2-xMx)O12 (1) In the formula (1), x and z satisfy 0.00<x<1.10, and 0.00<z≤0.15, and M is two or more types of elements selected from the group consisting of Nb, Ta, and Sb.

## Claims

### Claim 1

A solid electrolyte, represented by the following compositional formula (1):
Li7-x(La3-zYz)(Zr2-xMx)O12 (1)
wherein x and z satisfy 0.00<x<1.10, and 0.00<z≤0.15, and M is two or more types of elements selected from the group consisting of Nb, Ta, and Sb.

### Claim 2

A method for producing a solid electrolyte comprising:
a mixing step of mixing multiple types of raw materials containing metal elements included in the following compositional formula (1), thereby obtaining a mixture;
a first heating step of subjecting the mixture to a first heating treatment thereby forming a calcined body; and
a second heating step of subjecting the calcined body to a second heating treatment thereby forming a crystalline solid electrolyte represented by the following compositional formula (1):
Li7-x(La3-zYz)(Zr2-xMx)O12 (1)
wherein x and z satisfy 0.00<x<1.10, and 0.00<z≤0.15, and M is two or more types of elements selected from the group consisting of Nb, Ta, and Sb.

### Claim 3 (depends on 2)

The method for producing a solid electrolyte according to claim 2, wherein a heating temperature in the first heating step is 500° C. or higher and 650° C. or lower.

### Claim 4 (depends on 2)

The method for producing a solid electrolyte according to claim 2, wherein a heating temperature in the second heating step is 800° C. or higher and 1000° C. or lower.

### Claim 5 (depends on 1)

A composite body, comprising:
an active material; and
the solid electrolyte according to claim 1 that coats a part of a surface of the active material.