▎ 摘　　要

NOVELTY - Sulfide solid electrolyte modified by two-dimensional carbon material comprises a two-dimensional carbon material uniformly distributed in a sulfide electrolyte. The sulfide electrolyte comprises lithium-ion and anion containing at least sulfur element. The mass fraction of the two-dimensional carbon material calculated by carbon element is 150ppm-10%. USE - Sulfide solid electrolyte modified by two-dimensional carbon material for a solid-state battery anode of a full-solid-state lithium secondary battery (all claimed). ADVANTAGE - The sulfide solid electrolyte modified by the two-dimensional carbon material is a lithium ion-electron mixed conductor, which can significantly reduce or avoid the use of carbon-containing conductive agents in solid state anodes, and effectively avoids the decomposition of sulfide solid electrolyte and the degradation of cycle performance caused by the addition of conductive agents. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparation method of sulfide solid electrolyte modified by two-dimensional carbon material.