SOLVENT-REAGENT BASED SYNTHESIS OF SOLID-STATE ELECTROLYTES

The present disclosure is directed to processes for the preparation of argyrodite type materials, use of such argyrodite type materials in synthesis of solid-state electrolytes, and inclusion in secondary rechargeable batteries such as lithium ion batteries (LIBs), solid state batteries (SSBs), and/or lithium metal batteries (LMBs). For example, in an aspect the present disclosure provides a process that includes contacting a lithium source with a phosphorus source in a solvent-reagent at a temperature from about 80° C. to about 120° C. to form a precipitate comprising the LiPSY(where Y is Cl, Br, or I, and 0