Producing method for argyrodite type solid electrolyte, argyrodite type solid electrolyte, and all solid state battery having the same

摘要

Provided are a method for manufacturing an azirodite-type solid electrolyte, an azirodite-type solid electrolyte, and an all-solid-state battery comprising the same. The preparation method includes a first step of adding the precursors represented by the following Chemical Formulas 1 and 2 in a polar aprotic solvent, followed by stirring to obtain a reaction solution; a second step of adding P ₂ S ₅ into the stirred reaction solution and then further stirring to generate a precipitate obtained as a result of the reaction in the reaction solution; and drying the reaction solution in which the precipitate is formed and heat-treating it to obtain a solid electrolytea third step of obtaining [Formula 1] A ₂ S, [Formula 2] AX, in Formulas 1 and 2, A is an alkali metal, and X is a halogen element.