Solvent-reagent based synthesis of solid-state electrolytes

Patent metadata

Field	Value
Publication number	US-12580224-B2
Application number	US-202217878441-A
Country	US
Kind code	B2
Filing date	Aug 1, 2022
Priority date	Aug 1, 2022
Publication date	Mar 17, 2026
Grant date	Mar 17, 2026

Abstract

The present disclosure is to processes for the preparation of argyrodite type materials, use of such argyrodite type materials in synthesis of solid-state electrolytes, and inclusion in secondary rechargeable batteries such as lithium ion batteries (LIBs), solid state batteries (SSBs), and/or lithium metal batteries (LMBs). For example, in an aspect the present disclosure provides a process that includes contacting a lithium source with a phosphorus source in a solvent-reagent at a temperature from about 80° C. to about 120° C. to form a precipitate comprising the Li7-xPS6-xYx (where Y is Cl, Br, or I, and 0<x<2) and a supernate, and then collecting the precipitate. The solvent-reagent includes SyYw where y≥1, Y is as discussed previously (Y is Cl, Br, or I), and 0<w≤2.

First claim

What is claimed is:

1 . A process for synthesizing Li 7-x PS 6-x Y x , the process comprising:
contacting a lithium source with a phosphorus source in a solvent-reagent at a temperature from about 80° C. to about 120° C. to form a precipitate comprising the Li 7-x PS 6-x Y x where Y is Cl, Br, or I and 0<x<2 and a supernate; and collecting the precipitate; wherein the solvent-reagent comprises S y Y w where y≥1 and 0<w≤2; and wherein the lithium source comprises lithium foil, lithium ribbon, lithium particles, or lithium sand.

2 . The process of claim 1 , wherein the lithium source further comprises LiCl, Li 2 S, LiP, Li 3 P , or a mixture of any two or more thereof.

3 . The process of claim 1 , wherein the phosphorus source comprises P 0 , PCl 3 , PCl 5 , P 2 S 5 , or a mixture of any two or more thereof.

4 . The process of claim 1 , wherein 1<y≤50.

5 . The process of claim 1 , wherein the solvent-reagent comprises S y Cl w.

6 . The process of claim 1 , wherein x is 1.

7 . The process of claim 1 , wherein the contacting is conducted substantially in the absence of oxygen, water, or both oxygen and water.

8 . The process of claim 1 , wherein the contacting is conducted substantially in the absence of at least one of: oxygen and moisture.

9 . The process of claim 1 , wherein the contacting further comprises precipitating the Li 7-x PS 6-x Y x by seeding with exogenous Li 7-x PS 6-x Y x.

10 . The process of claim 1 further comprising lowering the temperature of the supernate to induce additional precipitation of the Li 7-x PS 6-x Y x.

11 . The process of claim 1 which is conducted in a continuous reactor.

12 . The process of claim 1 which is conducted in a batch reactor.

13 . The process of claim 1 , wherein the lithium source comprises lithium foil, lithium ribbon, or lithium particles.

Assignees

• Rivian Ip Holdings Llc

Inventors

• Aykol Muratahan
• Chinnam Parameswara Rao

Classifications

• H01M2300/008

  Halides · CPC title

• C01P2006/40

  Electric properties · CPC title

• H01M2220/20

  Batteries in motive systems, e.g. vehicle, ship, plane · CPC title

• C01P2002/54

  one element only · CPC title

• C01B25/14

  Sulfur, selenium, or tellurium compounds of phosphorus · CPC title