Sulfide solid electrolyte

Patent metadata

Field	Value
Publication number	US-9537174-B2
Application number	US-201013389129-A
Country	US
Kind code	B2
Filing date	Aug 31, 2010
Priority date	Sep 9, 2009
Publication date	Jan 3, 2017
Grant date	Jan 3, 2017

Abstract

A sulfide solid electrolyte with excellent ion conductivity and a method for producing a crystallized glass contained in the sulfide solid electrolyte. A sulfide solid electrolyte comprising a crystallized glass represented by the following chemical formula yLi 2 S•(100-x-y)P 2 S 5 •xP 2 O 5 , wherein 0<x<25 and 67<y<80.

First claim

The invention claimed is:

1. A sulfide solid electrolyte comprising a crystallized glass represented by the following chemical formula (1):
75Li 2 S•(25- x )P 2 S 5 •x P 2 O 5   (1)

wherein:
0<x<25.

2. The sulfide solid electrolyte according to claim 1 , wherein the crystallized glass has a crystallinity of 50 to 100%.

3. The sulfide solid electrolyte according to claim 1 , having an ortho composition.

4. The sulfide solid electrolyte according to claim 1 , wherein the crystallized glass does not comprise a P 2 S 7 4− ion.

5. The sulfide solid electrolyte according to claim 1 , wherein 0<x≦20.

6. The sulfide solid electrolyte according to claim 1 , wherein 0<x≦15.

7. The sulfide solid electrolyte according to claim 1 , wherein 5≦x≦20.

8. The sulfide solid electrolyte according to claim 1 , wherein 5≦x≦15.

9. A method for producing a crystallized glass, comprising:
preparing a raw material composition comprising Li 2 S, P 2 S 5 and P 2 O 5 so that a content of Li 2 S is 75 mol % when a total content of Li 2 S, P 2 S 5 and P 2 O 5 is 100 mol %;
amorphizing the raw material composition; and
crystallizing a glass obtained by the amorphization by heating;
wherein the crystallized glass comprises a PS 4 3− ion but does not comprise a P 2 S 7 4− ion.

10. The method according to claim 9 , wherein the raw material composition is amorphized by mechanical milling.

11. A method for producing a crystallized glass, comprising:
preparing a raw material composition comprising Li 2 S, P 2 S 5 and P 2 O 5 so that a content of Li 2 S is 75 mol % when a total content of Li 2 S, P 2 S 5 and P 2 O 5 is 100 mol %;
amorphizing the raw material composition; and
crystallizing a glass obtained by the amorphization by heating.

12. The method according to claim 11 , wherein the raw material composition is amorphized by mechanical milling.

Assignees

• Tatsumisago Masahiro
• Hayashi Akitoshi
• Hama Shigenori
• Kawamoto Koji
• Ohtomo Takamasa
• Toyota Motor Co Ltd

Inventors

• Tatsumisago Masahiro
• Hayashi Akitoshi
• Hama Shigenori
• Kawamoto Koji
• Ohtomo Takamasa

Classifications

• Y02E60/122

  Cross-Sectional Technologies · mapped topic

• Y02P70/54

  Cross-Sectional Technologies · mapped topic

• H01M2300/0071

  Oxides · CPC title

• H01M10/0525

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

• H01M10/0562 Primary

  Solid materials · CPC title