SULFIDE SOLID STATE ELECTROLYTE, AS WELL AS PREPARATION METHOD THEREFOR AND USE THEREOF

WIPO Patent Application WO/2023/217260

A1

The present invention specifically relates to a sulfide solid state electrolyte, as well as a preparation method therefor and the use thereof. The electrolyte material of the present invention is Li6P1-a(M)aS5X (M being one of or a composition of more of vanadium, niobium and tantalum elements, and X being one or more of F, Cl and Br). The sulfide solid state electrolyte material provided by the present invention uses Group VB elements to partly replace P element; and while ensuring the sulfide electrolyte material having a good argyrodite crystal phase, controllable doping of elements such as vanadium, niobium and tantalum can improve compatibility with a lithium series negative electrode, thus achieving better electrochemical stability, and further improving cycling stability of a sulfide all-solid-state battery.

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ZHANG XI (CN)
ZHU JINHUI (CN)
CHEN ZHENYING (CN)

PCT/CN2023/093799

November 16, 2023

May 12, 2023

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SHANGHAI FIRM LITHIUM NEW ENERGY TECH CO LTD (CN)

H01M10/0562

WO2021008360A1

2021-01-21

CN114933331A	2022-08-23
US20200373609A1	2020-11-26
CN110085908A	2019-08-02
CN113506911A	2021-10-15
JP2020031027A	2020-02-27

BEIJING FINELAND IP FIRM (CN)

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