Solid electrolyte and lithium ion battery

Patent metadata

Field	Value
Publication number	US-10774004-B2
Application number	US-201716085949-A
Country	US
Kind code	B2
Filing date	Mar 13, 2017
Priority date	Mar 18, 2016
Publication date	Sep 15, 2020
Grant date	Sep 15, 2020

Abstract

A solid electrolyte capable of securing grain boundary resistance even when sintering is performed at a relatively low temperature and a lithium ion battery using the solid electrolyte are provided. The solid electrolyte includes a first electrolyte which contains a lithium composite metal compound containing one kind of first metal element selected from group 13 elements in period 3 or higher, and a second electrolyte which contains Li and at least two kinds of second metal elements selected from group 5 elements in period 5 or higher or group 15 elements in period 5 or higher.

First claim

The invention claimed is:

1. A solid electrolyte comprising:
a first electrolyte which contains a lithium composite metal compound containing Ga; and
a second electrolyte which contains Li, Sb and at least one kind of second metal element selected from group 5 elements in period 5 or higher or group 15 elements in period 5 or higher.

2. The solid electrolyte according to claim 1 , wherein an atomic crystal radius of the second metal element is 78 pm or more.

3. The solid electrolyte according to claim 1 , wherein the one kind of the second metal element is selected from Nb, Ta, and Bi.

4. The solid electrolyte according to claim 1 , further comprising:
a third electrolyte which is amorphous and is formed of an oxide containing Li and B.

5. A lithium ion battery comprising:
a solid electrolyte layer formed of the solid electrolyte according to claim 1 ;
an electrode provided on one surface of the solid electrolyte layer; and
a current collector provided on a side of the solid electrolyte layer opposite to the one surface of the solid electrolyte layer.

6. The lithium ion battery according to claim 5 ,
wherein the electrode is formed of metal lithium, and
wherein a positive electrode active material layer containing Li is provided between the other surface of the solid electrolyte layer and the current collector.

Assignees

• Seiko Epson Corp

Inventors

• Yamamoto Hitoshi
• Yokoyama Tomofumi

Classifications

• Y02P70/50

  Manufacturing or production processes characterised by the final manufactured product · CPC title

• C04B2235/428

  Silicon · CPC title

• H01M2300/0088

  Composites · CPC title

• H01M2300/002

  Inorganic electrolyte · CPC title

• C04B35/62625

  Wet mixtures · CPC title