Effect of Pressure and Temperature on the Performance of Argyrodite Li₆PS₅Cl_0.5Br_0.5 Electrolyte for All-Solid-State Lithium Battery

Solid state electrolytes are promising materials for use in lithium-ion batteries for applications in electric vehicles and aircraft. One of the most promising solid electrolytes are the Argyrodite materials, Li₆PS₅X(X = Cl, Br, I). Among Argyrodites, Li₆PS₅Cl_0.5Br_0.5 crystalline material has high ionic conductivity, good processability and excellent electrochemical stability. It is reported in literature that the pelletization pressure and operating pressure and temperature significantly affect the ionic conductivity of argyrodite electrolytes and the cell performance. The focus of this paper is on Li₆PS₅Cl_0.5Br_0.5, a crystalline electrolyte material, and the goals are to systematically investigate effects of the pelletization pressure and operating pressure and temperature on the ionic conductivity of this material. The results of this study help to understand the range of pelletization, and operating pressures of all-solid-state lithium sulfur batteries made with Li₆PS₅Cl_0.5Br_0.5 crystalline electrolyte material.