▎ 摘　　要

NOVELTY - Preparing all-solid-state battery, comprises (a) mixing the anode active material, conductive agent, and sodium tetrachloroaluminate solid electrolyte, grinding and sieving, and pressing into tablets to obtain a composite anode sheet; (b) mixing sodium chloride and aluminum chloride according to stoichiometric ratio to obtain fine sodium tetrachloroaluminate solid electrolyte powder through high-temperature mutual melting reaction and mechanical grinding; (c) cutting sodium and/or indium metal into cathode with preset diameters; and (d) heating the fine sodium tetrachloroaluminate solid electrolyte powder with a heating furnace, assembling the molten sodium tetrachloroaluminate solid electrolyte with the composite anode sheet, cooling and forming molten sodium tetrachloroaluminate solid electrolyte, heating the cathode sheet to melting with a heating furnace, and assembling other end of sodium tetrachloroaluminate solid electrolyte with the molten cathode, and packaging. USE - The method is useful for preparing all-solid-state battery. ADVANTAGE - The composite anode and the interface of cathode solid electrolyte contact is improved, which greatly improves the electrochemical performance and working stability of the all-solid-state battery. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for an all-solid-state battery.