▎ 摘　　要

NOVELTY - Preparing lithium-replenishing functional electrolyte membrane comprises e.g. respectively adding lithium-containing compound, inorganic solid electrolyte, binder and conductive agent, respectively dispersing the weighed lithium-containing compound and inorganic solid electrolyte in N-methyl-2-pyrrolidone (NMP), and respectively milling to prepare lithium-containing compound dispersion and inorganic solid electrolyte dispersion, preparing adhesive solution, mixing lithium-containing compound dispersion and inorganic solid electrolyte dispersion, and adding conductive agent, continuously ball milling and dispersing, mixing to prepare the mixed dispersion, adding binder solution to mixed dispersion, ball milling and mixing to obtain uniform slurry, and drying in oven of coating machine to form a lithium replenishing electrolyte layer between the reinforcing layer and the framework layer, obtaining the lithium-replenishing functional electrolyte membrane for solid lithium battery. USE - The lithium-replenishing functional electrolyte membrane is useful for solid-state lithium battery (claimed), and in portable electronic product and electric automobile field. ADVANTAGE - The method: provides lithium-replenishing functional electrolyte with improved cycle performance of 50% and excellent temperature resistance.