Compound, solid electrolyte, electrochemical cell, method for preparing compound, and protected positive electrode active material

Abstract

The invention relates to a compound, a solid electrolyte, an electrochemical cell, a method for preparing the compound, and a protected positive electrode active material. The compound is represented by Formula 1 and has an argyrodite-type crystal structure. In Formula 1, M1 is at least one metal element of Group 1 to Group 15 of the periodic table except Li, M2 is SOn, and M3 is at least one element of Group 17 of the periodic table; and 4 < = x < = 8, 0 < = v< 1, 3 < = y < = 7, 0<w<2; 0 < = z < = 2, and 1.5 < = n < = 5. Formula 1: Li<x> M1<v> PS<y> M2<w> M3 .

Description

[0001] Cross References to Related Applications

[0002] This application claims Korean Patent Application No. 10-2019-0138765 filed with the Korean Intellectual Property Office on November 1, 2019 and Korean Patent Application No. 10-2020-0115523 filed with the Korean Intellectual Property Office on September 9, 2020 The priority and interest of, and all interests arising therefrom, the contents of which are hereby incorporated by reference in their entirety. technical field

[0003] The present disclosure relates to solid ionic conductors, solid electrolytes including the solid ionic conductors, lithium batteries including the solid ionic conductors, and methods of making the solid ionic conductors. Background technique

[0004] All solid lithium batteries include a solid electrolyte. All-solid batteries can avoid the use of flammable organic solvents, and thus can provide improved safety and stability.

[0005] Solid electrolyte materials are not sufficiently stable wit...

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