METHOD OF MANUFACTURING ARGYRODITE-TYPE SOLID ELECTROLYTE, ARGYRODITE-TYPE SOLID ELECTROLYTE, AND ALL-SOLID-STATE BATTERY COMPRISING THE SOLID ELECTROLYTE

摘要

A method of manufacturing an argyrodite-type solid electrolyte, an argyrodite-type solid electrolyte, and an all-solid-state battery including the argyrodite-type solid electrolyte are provided. The method includes a first step of adding precursors represented by the following Formulas 1 and 2 into a polar aprotic solvent, followed by stirring to obtain a reaction solution; a second step of adding P₂S₅ into the stirred reaction solution, followed by further stirring to form a precipitate obtained as a result of the reaction in the reaction solution; and a third step of drying and heat-treating the reaction solution in which the precipitate is formed to obtain a solid electrolyte: [Formula 1] A₂S [Formula 2] AX wherein A represents an alkali metal, and X represents an element of the halogen group.