New method for the preparation of a li-p-s product and corresponding products

Patent metadata

Field	Value
Publication number	US-2022263123-A1
Application number	US-202017630541-A
Country	US
Kind code	A1
Filing date	Sep 4, 2020
Priority date	Sep 6, 2019
Publication date	Aug 18, 2022
Grant date	—

Abstract

The present invention concerns a new method for the preparation of a Li—P—S product, as well as the products obtainable by said methods, and uses thereof especially as solid electrolytes.

First claim

1 - 10 . (canceled)

11 . A method of preparing a Li—P—S product, the method comprising at least the following steps:
(a) mixing at least Li 4 P 2 S 6 , Li 2 S and sulfur to obtain a first mixture;
(b) heating the first mixture in an inert atmosphere, under vacuum or under H 2 S flow, for a period of time and at a temperature sufficient to produce the Li—P—S product; and
(c) cooling and optionally powdering the Li—P—S product.

12 . The method according to claim 11 , wherein the Li—P—S product is selected from the group consisting of: Li 7 P 3 S 11 , Li 3 PS 4 , Li 7 PS 6 , and Li 96 P 3 S 12 .

13 . The method according to claim 11 , wherein the temperature in step (b) is comprised from 150° C. to 600° C.

14 . The method according to claim 11 , wherein the heating in step (b) is made over a time period of from 1 hour to 200 hours.

15 . The method according to claim 11 , wherein Li 4 P 2 S 6 is obtained from the reaction between Li 2 S and P 2 S 5 .

16 . The Li—P—S product obtainable by the method of claim 11 .

17 . A product of formula Li 7 P 3 S 11 , comprising a crystal structure and a volume V per formula unit at room temperature, using the cell parameters acquired at standard atmosphere, comprised between 407 and 412 angstrom cube, as measured by X-Ray Diffraction, using a Bruker D8 diffractometer with Cu Kα radiation.

18 . A method of using the product of 17, the method comprising using the product, alone or in combination with any crystalline or amorphous conductive Li-material, as solid electrolyte.

19 . A solid electrolyte comprising at least the product of claim 17 .

20 . A battery comprising at least the product of claim 17 .

Assignees

• Rhodia Operations
• Centre Nat Rech Scient
• Univ Picardie

Inventors

• Braida Marc-David
• Kudu Ömer Ulas
• Masquelier Christian
• Le Mercier Thierry
• Fleutot Benoit

Classifications

• H01M10/0562 Primary

  Solid materials · CPC title

• C01B17/22 Primary

  Alkali metal sulfides or polysulfides · CPC title

• C01P2002/72

  by d-values or two theta-values, e.g. as X-ray diagram · CPC title

• H01B1/10 Primary

  sulfides · CPC title

• H01M10/0525

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