INORGANIC SULFIDE SOLID ELECTROLYTE HAVING HIGH AIR STABILITY, AND PREPARATION METHOD AND USE THEREOF

An inorganic sulfide solid electrolyte having high air stability, and a preparation method and use thereof. In the invention, some or all of P elements in a sulfide electrolyte are replaced with Sb elements, thereby providing an electrolyte having high air stability and ion mobility and applicable to an all-solid lithium secondary battery. The resulting inorganic sulfide electrolyte comprises the following materials: Li10M(P1-aSba)2S12, Li6(P1-aSba)S5X and Li3(P1-aSba)S4, where M is one or more of Ge, Si or Sn, X is one or more of F, Cl, Br or I, and 0.01≤a≤1.