Method for improving ionic conductivity of solid electrolyte LLZO

The invention provides a method for improving ionic conductivity of solid electrolyte LLZO. The method comprises the following steps: calcining lanthanum oxide in a muffle furnace to remove impurities; taking out raw materials including lithium hydroxide monohydrate, lanthanum oxide and zirconium oxide required for preparing LLZO and doped raw materials including gallium oxide and tantalum oxide, mixing according to a certain atomic ratio, and then carrying out ball milling, drying and sieving; putting the mixed raw materials into a muffle furnace to be calcined, and enabling the raw materials to react to form LLZO; carrying out ball milling, drying and sieving on the LLZO mother powder obtained after calcining; putting the LLZO mother powder into a mold to be pressed into a wafer, putting the wafer into a muffle furnace to be sintered, and after sintering is completed, using abrasive paper for polishing to remove surface residues. The method for improving the ionic conductivity of the LLZO is the simple meth