Synthesis of sulfide solid electrolytes from Li2S and P2S5 in anisole

Abstract

We report the liquid-phase synthesis of sulfide solid electrolytes from Li₂S and P₂S₅ using anisole at 200–300 °C under microwave irradiation, in which β-Li₃PS₄ and Li₇P₃S₁₁ were directly precipitated in anisole in 30 min. Anisole afforded reasonable reactivity toward Li₂S and P₂S₅ to form β-Li₃PS₄ and Li₇P₃S₁₁ powders at 200–300 °C. Moreover, a Li₆PS₅Cl precursor solution was synthesized from a Li₃PS₄–anisole suspension by adding ethanol, Li₂S, and LiCl. The proposed synthesis using anisole is advantageous as a simple, short-time process and would be applicable for the production of all-solid-state batteries.