▎ 摘　　要

NOVELTY - Preparation of all-solid-state lithium-sulfur battery composite anode material involves mixing sulfur source, coating modifying agent and a dispersion medium, and drying and grinding to obtain a coated sulfur source powder, mixing an inorganic solid electrolyte raw material, a chelating agent and a dispersing solvent for sol-gel processing to obtain a gel system, grinding the gel system to obtain a solid electrolyte precursor gel powder, mixing the solid electrolyte precursor gel powder and the dispersing agent to obtain a solid electrolyte precursor powder, mixing the coated sulfur source powder and solid electrolyte precursor powder, and calcining under protective gas conditions to obtain a sulfur-containing sintered component, mixing the sulfur-containing sintered component, organic solvent and oxidant, and performing oxidation. USE - Preparation of composite anode material used for all-solid-state lithium-sulfur battery (claimed). ADVANTAGE - The method enables preparation of the full-solid lithium-sulfur battery composite anode material with uniform grain diameter, uniform distribution of carbon and solid electrolyte particles, increased charging and discharging current density of 0.2 C, reversible capacity of 111-112 mAh/g, coulomb efficiency of 95% or more, and capacity conservation rate after 20 times of charging and discharging circulation of 76% or more. DETAILED DESCRIPTION - Preparation of all-solid-state lithium-sulfur battery composite anode material involves mixing sulfur source, coating modifying agent and a dispersion medium, and drying and grinding to obtain a coated sulfur source powder, mixing an inorganic solid electrolyte raw material, a chelating agent and a dispersing solvent for sol-gel processing to obtain a gel system, grinding the gel system to obtain a solid electrolyte precursor gel powder, mixing the solid electrolyte precursor gel powder and the dispersing agent to obtain a solid electrolyte precursor powder, mixing the coated sulfur source powder and solid electrolyte precursor powder, and calcining under protective gas conditions to obtain a sulfur-containing sintered component, mixing the sulfur-containing sintered component, organic solvent and oxidant for oxidation reaction. The coating modifying agent comprises one or more of polydopamine, resorcinol-formaldehyde resin, sugar, polyvinylpyrrolidone, tannic acid, citric acid, polyvinyl alcohol, polypyrrole, vitamin C, polyethylene glycol, asphalt, anthracene and aniline. The dispersing agent comprises one or more of Super P (RTM: conductive carbon black), electroconductive graphite, electroconductive carbon black, electroconductive carbon fibers, and graphene. An INDEPENDENT CLAIM is included for the all-solid-state lithium-sulfur battery composite anode material, which comprises uniformly dispersed elemental sulfur, carbon and solid electrolyte.