New, Highly Ion‐Conductive Crystals Precipitated from Li 2 S–P 2 S 5 Glasses

Novel sulfide lithium-ion conducting materials are synthesized by crystallization of mechanically milled Li2S–P2S5 glasses. High ambient-temperature conductivities (σ) compared with other electrolytes (see Figure) and a low conduction activation energy are achieved by the formation of a highly conductive new crystalline phase.