Oxide solid electrolytes based on lithium halide-doping and low-temperature sintering method thereof

Provided is an oxide solid electrolyte based on lithium halide-doping. The oxide solid electrolyte is a lithium solid electrolyte, wherein electrolytes in a perovskite type, an NASICON type and a garnet type are taken as substrates, and a lithium halide solution and the oxide solid electrolytes are compounded and sintered at a low temperature. A preparing method comprises the steps that LATP, LLTOand LLZO solid electrolytes are subjected to ball-milling, or self-produced cubic-phase lithium-lanthanum-zirconium-oxygen solid electrolyte powder is subjected to ball-milling and sintered to prepare cubic-phase LLZO solid electrolyte powder, an LIX solution is added to the solid electrolyte powder, and the mixture is pressed into a slice or painted into a membrane, then placed in a muffle furnace at a low temperature of 100-250 DEG C and sintered for 1-10 hours. The oxide solid electrolyte is simple in technology and low in cost, and the prepared lithium solid electrolyte has high ionic conductivity and high repeat