Solid electrolyte, method for producing solid electrolyte, and composite

Patent metadata

Field	Value
Publication number	US-11735766-B2
Application number	US-202117458988-A
Country	US
Kind code	B2
Filing date	Aug 27, 2021
Priority date	Aug 28, 2020
Publication date	Aug 22, 2023
Grant date	Aug 22, 2023

Abstract

The solid electrolyte according to an embodiment of the present disclosure is represented by the following formula (1):

Li 7-x-y La 3 (Zr 2-x-y In x M y )O 12   (1)
wherein 0.00<x<0.20, 0.20≤y<1.50, M is two or more 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 formula (1):
Li 7-xy La 3 (Zr 2-x-y In x M y )O 12   (1)

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

2. A method for producing a solid electrolyte comprising:
a mixing step for mixing a plurality of raw materials to obtain a mixture, the plurality of raw materials including a metal element included in the following formula (1),
a first heating step for subjecting the mixture to a first heat treatment to form a calcined body,
and a second heating step for subjecting the calcined body to a second heat treatment to form a crystalline solid electrolyte represented by the following formula (1):
Li 7-xy La 3 (Zr 2-x-y In x M y )O 12   (1)

wherein 0.00<x<0.20, 0.20≤y<1.50, M is two or more 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 from 500° C. to 650° C.

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

5. A composite comprising:
an active material,
and the solid electrolyte according to claim 1 covering a portion 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

• H01M4/131

  Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx · CPC title

• H01M4/366

  as layered products · CPC title

• H01M4/525

  of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy · CPC title

• H01M10/0525

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