▎ 摘　　要

NOVELTY - Sulfur/polyaniline nanotube/reduced graphene oxide composite material comprises elemental sulfur, polyaniline nanotubes and reduced graphene oxide nanosheets, where the elemental sulfur is carried inside the polyaniline nanotubes, and the reduced graphene oxide nanosheets are coated on the outer surface of the polyaniline nanotubes. USE - The composite material is used as positive electrode active material of lithium-sulfur battery (claimed). ADVANTAGE - The method improves the electronic conductivity of the sulfur material, inhibits the shuttle effect of long-chain polysulfide lithium, improves the interface performance of the material, improves the utilization rate and capacity of the active material of the material, and improves the cycle stability of the material. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing the sulfur/polyaniline nanotube/reduced graphene oxide composite material, involving (i) dispersing polyaniline nanotubes and graphene oxide nanosheets with carboxyl groups on the surface uniformly in a solvent, and performing acylation reaction under action of a catalyst to bond graphene oxide nanosheets to the outer surface of polyaniline nanotubes through amide bonds to obtain a polyaniline nanotube/graphene oxide composite material, (ii) uniformly dispersing the prepared polyaniline nanotube/graphene oxide composite material in water, and adding hydrazine hydrate to perform reduction reaction to obtain a polyaniline nanotube/reduced graphene oxide composite material, and (iii) uniformly mixing the prepared polyaniline nanotube/reduced graphene oxide composite material with hydrochloric acid and sodium thiosulfate solution, performing disproportionation reaction to generate elemental sulfur inside polyaniline nanotubes to obtain the product.