IP Library › Granted Patent US 12,374,717
Granted Patent B2
US 12,374,717 · App. 18/671,779 · Granted Jul 29, 2025

Surface treatment of a sulfide glass solid electrolyte layer

Inventors: Steven J. Visco (Berkeley, CA); Vitaliy Nimon (Berkeley, CA); Alexei Petrov (Berkeley, CA); Yevgeniy S. Nimon (Berkeley, CA); Bruce D. Katz (Berkeley, CA)
Assignee: PolyPlus Battery Company
H01M10/0562C03C3/321C03C4/14C03C15/02H01M10/0525C03C2204/00H01M2300/0068
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Quick Facts
Patent No.
US 12,374,717
App. No.
18/671,779
Filed
May 22, 2024
Granted
Jul 29, 2025
Kind
B2
Art Unit
1716
USPC
216/41
Abstract

Chemically treating ionically conductive sulfide glass solid electrolyte separators or separator layers can improve performance. In particular, treatment involving chemically etching a surface or surface region of the sulfide glass separator to blunt, lessen or remove edge defects or surface flaws, and/or to enhance surface smoothness is cost effective, reliable and well suited for high production environments compared to physical methods of removing scratches or smoothing surfaces, such as mechanical grinding and polishing.

Claims (12)

1. A method for treating a surface of an ion conductive sulfide glass solid electrolyte, the method comprising exposing a surface or surface region of the sulfide glass solid electrolyte to an etching media, wherein water molecules are the etching media active etching species.

2. A method for treating a surface of an ion conductive sulfide glass solid electrolyte, the method comprising exposing a surface or surface region of the sulfide glass solid electrolyte to an etching media,

wherein the etching media is a gaseous/vapor phase;

wherein the etching media further comprises a nitrogen carrier gas that is inert in contact with the sulfide glass solid electrolyte.

3. A method for treating a surface of an ion conductive sulfide glass solid electrolyte, the method comprising exposing a surface or surface region of the sulfide glass solid electrolyte to an etching media,

wherein the etching media is a gaseous/vapor phase; and

wherein the gaseous/vapor phase comprises water vapor as an active etchant.

4. A method for treating a surface of an ion conductive sulfide glass solid electrolyte, the method comprising exposing a surface or surface region of the sulfide glass solid electrolyte to an etching media,

wherein the etching media is a gaseous/vapor phase; and

wherein the gaseous/vapor phase comprises acid vapor as an active etchant.

5. The method of claim 4 wherein pressure regulation of the vapor is achieved in part by controlling the temperature and/or the ratio between the acid in the vapor phase and the carrier gas.

6. The method of claim 4 wherein the acid vapor comprises carbonic acid vapor.

Continuity (3)
Continuation 17303708 · Jun 4, 2021
Provisional Application 63061126 · Aug 4, 2020
Related Publication 20240347764A1 · Oct 17, 2024
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