▎ 摘　　要

NOVELTY - The method involves ball milling and mixing the negative electrode active material. The mixed negative electrode active material and solid electrolyte are ball milled to obtain a composite negative electrode, under the protection of an inert gas. The negative active material includes indium and carbon material. The negative active material includes indium, carbon material and silicon material. The carbon material includes graphite, carbon nanotubes, graphene and mesocarbon microspheres. The solid electrolyte includes sulfide solid electrolyte, oxide solid electrolyte, polymer solid electrolyte and halide solid electrolyte. USE - Method for preparing composite negative electrode suitable for all-solid-state batteries (all claimed) e.g. lithium-ion battery. ADVANTAGE - The method is simple, easy to scale production, and can realize stable circulation of full solid lithium the battery under high rate. The indium particles are uniformly distributed in the whole negative electrode avoids the deposition on the negative electrode and solid electrolyte interface lithium. The cycle performance of the battery is effectively improved under high multiplying power. The mass ratio of indium in the total mass of the composite negative electrode is 10-45%. The method optimizes the proportion parameter of the indium and other negative electrode active substance, successfully obtaining the full-solid-state battery with high multiplication power and long cycle performance. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) a composite negative electrode suitable for all solid-state battery; and (2) a full-solid-state battery. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the composite negative electrode.