Solid state electrolyte

Abstract

Aspects of the disclosure relate to solid state electrolytes which include a composition of Li6PS5Cl having a dopant substituted, in part, for phosphorus (P-site dopant) and an excess molar amount of Cl (i.e., doped, off-stoichiometric compositions). The P-site dopant can be selected among Groups 4, 5, 14, or 15 of the periodic table of elements and has an ionic radius greater than phosphorus (P). Such solid state electrolytes can be used in all solid-state batteries and configured for use in electric vehicles.

Dependencies are inferred from the claim text.