Solid Electrolyte, Method For Producing Solid Electrolyte, And Composite Body

Patent metadata

Field	Value
Publication number	US-2021280902-A1
Application number	US-202117194444-A
Country	US
Kind code	A1
Filing date	Mar 8, 2021
Priority date	Mar 9, 2020
Publication date	Sep 9, 2021
Grant date	—

Abstract

A solid electrolyte according to the present disclosure is represented by the following compositional formula (1).
Li 7-x+y (La 3-y Sr y )(Zr 2-x M x )O 12   (1)

In the formula (1), x and y satisfy 0.20≤x<1.50 and 0.00<y<0.30, and M is two or more types of elements selected from the group consisting of Nb, Ta, and Sb.

First claim

What is claimed is:

1 . A solid electrolyte, represented by the following compositional formula (1):
Li 7-x+y (La 3-y Sr y )(Zr 2-x M x )O 12   (1)
wherein x and y satisfy 0.20≤x<1.50 and 0.00<y<0.30, and M is two or more types of elements selected from the group consisting of Nb, Ta, and Sb.

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):
Li 7-x+y (La 3-y Sr y )(Zr 2-x M x )O 12   (1)

wherein x and y satisfy 0.20≤x<1.50 and 0.00<y<0.30, and M is two or more types of elements selected from the group consisting of Nb, Ta, and Sb.

3 . 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.

4 . 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.

5 . 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.

Assignees

• Seiko Epson Corp

Inventors

• Yamamoto Hitoshi
• Teraoka Tsutomu
• Yokoyama Tomofumi

Classifications

• H01M10/0562 Primary

  Solid materials · CPC title

• H01M10/058

  Construction or manufacture · CPC title

• H01M2300/0091

  in the form of mixtures · CPC title

• H01M10/0525

  Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title