METHOD FOR PRODUCING SULFIDE SOLID ELECTROLYTE

Title:

METHOD FOR PRODUCING SULFIDE SOLID ELECTROLYTE

Document Type and Number:

WIPO Patent Application WO/2020/213340

Kind Code:

A1

Abstract:

This method for producing a sulfide solid electrolyte includes a firing step for firing a raw material at a temperature of 300°C or higher in a hydrogen-sulfide-containing atmosphere, the raw material including Li2S having a purity of 50-90 mass% inclusive at the start of firing. The Li2S includes at least one from among LiOH, Li2H, LiHCO3, and Li2CO3 as an impurity. In the firing step, the concentration of hydrogen sulfide in the hydrogen-sulfide-containing atmosphere is ideally 50 vol% or higher. The raw material preferably furthermore includes P2S5 and LiX (where X is at least one halogen element), and the the sulfide solid electrolyte preferably has an argyrodite crystal structure.

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Inventors:

ITO TAKAHIRO (JP)
HYAKUTAKE MASARU (JP)
MIYASHITA NORIHIKO (JP)

Application Number:

PCT/JP2020/012095

Publication Date:

October 22, 2020

Filing Date:

March 18, 2020

Export Citation:

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Assignee:

MITSUI MINING & SMELTING CO (JP)

International Classes:

C01B25/14; H01B13/00; H01M4/62; H01M10/052; H01M10/0562

Foreign References:

JP2012176866A	2012-09-13
JPH02204312A	1990-08-14
JP2017199631A	2017-11-02
US20160156064A1	2016-06-02

Other References: