High-conduction GE substituted LiAsS4 solid electrolyte

Patent metadata

Field	Value
Publication number	US-10326164-B2
Application number	US-201615060109-A
Country	US
Kind code	B2
Filing date	Mar 3, 2016
Priority date	Mar 3, 2015
Publication date	Jun 18, 2019
Grant date	Jun 18, 2019

Abstract

A solid electrolyte for a lithium battery includes Li3+xGexAs1-xS4 where x=0 to 0.50. The value of x can be a range of any high value and any lower value from 0 to 0.50. For example, x can be 0.25 to 0.50, and x can be 0.3 to 0.4, among many other possible ranges. In one embodiment x=0.33 such that the solid electrolyte is Li3.334Ge0.334As0.666S4. A solid electrolyte for a lithium battery can include LiAsS4 wherein ½ to ⅔ of the As is substituted with Ge. A lithium battery and a method for making a lithium battery are also disclosed.

First claim

We claim:

1. A solid electrolyte for a lithium battery, comprising Li 3+x Ge x As 1-x S 4 where x=0 to 0.50, and having an ionic conductivity of greater than 1 mScm −1 at 27° C. and an activation energy of no more than 0.3 eV.

2. The solid electrolyte of claim 1 wherein x=0.25 to 0.5.

3. The solid electrolyte of claim 1 , wherein x=0.3 to 0.4.

4. The solid electrolyte of claim 1 , wherein x=0.33.

5. The solid electrolyte of claim 1 , wherein the electrolyte has an ionic conductivity of at least 1.12 mScm −1 at 27° C.

6. A lithium battery comprising a solid electrolyte, the solid electrolyte comprising Li 3+x Ge x As 1-x S 4 , wherein x=0 to 0.50, and having an ionic conductivity of greater than 1 mScm −1 at 27° C. and an activation energy of no more than 0.3 eV.

7. The lithium battery of claim 6 , wherein x=0.25 to 0.50.

8. The lithium battery of claim 6 , wherein x=0.3 to 0.4.

9. The lithium battery of claim 6 , wherein x=0.33.

10. The lithium battery of claim 6 , wherein the electrolyte has an ionic conductivity of at least 1.12 mScm −1 at 27° C.

11. A solid electrolyte for a lithium battery, comprising LiAsS 4 wherein ½ to % of the As is substituted with Ge.

12. A lithium battery comprising a solid electrolyte, the solid electrolyte comprising LiAsS 4 wherein ½ to ⅔ of the As is substituted with Ge.

13. A method of making a lithium battery, comprising the steps of:
providing an anode and a cathode;
positioning between the anode and the cathode a solid electrolyte, wherein the electrolyte comprises Li 3+x Ge x As 1-x S 4 where x=0 to 0.50, and having an ionic conductivity of greater than 1 mScm −1 at 27° C. and an activation energy of no more than 0.3 eV.

Assignees

• Ut Battelle Llc

Inventors

• Liang Chengdu
• Dudney Nancy J
• Rangasamy Ezhiylmurugan
• SAHU Gayatri

Classifications

• H01M2300/0068

  inorganic · CPC title

• H01M10/052

  Li-accumulators · CPC title

• H01M10/0562 Primary

  Solid materials · CPC title

• H01B1/06

  mainly consisting of other non-metallic substances · CPC title

• Y02P70/50

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