▎ 摘　　要

NOVELTY - Lithium-sulfur battery anode material with a polydopamine-coated three-dimensional network structure, comprises graphene/carbon nanotubes, elemental sulfur and polydopamine. The elemental sulfur is dispersed on the graphene/carbon nanotubes to form a sulfur-carbon mixture with a three-dimensional network structure. The polydopamine is coated on the surface of the sulfur-carbon mixture to reinforce the three-dimensional network structure of the sulfur-carbon mixture. USE - The lithium-sulfur battery anode material with a polydopamine-coated three-dimensional network structure is useful for battery (claimed). ADVANTAGE - The anode material of the lithium-sulfur battery uses graphene/carbon nanotubes to construct a three-dimensional conductive network in the anode and reinforces the structure by coating the surface with conductive polymer polydopamine, can adsorb lithium polysulfide as an intermediate product, inhibits the shuttle effect, increases the conductivity of sulfur cathode and improves the performance of lithium-sulfur battery, and has a good effect in large-capacity soft-pack lithium-sulfur batteries, the mass energy density can reach 413.4 Wh/kg, and the charge-discharge cycle can reach 100 times. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) preparation method of lithium-sulfur battery anode material with a polydopamine-coated three-dimensional network structure, comprising (a) mixing graphene/carbon nanotubes with elemental sulfur, and heating in a closed environment to obtain a sulfur-carbon mixture with a three-dimensional network structure; and (b) dissolving tris(hydroxymethyl)aminomethane with water to obtain tris(hydroxymethyl)aminomethane buffer solution, adding dopamine hydrochloride into tris buffer solution, immediately soaking the sulfur-carbon mixture with a three-dimensional network structure in a tris buffer solution containing dopamine hydrochloride, stirring to obtain a polydopamine-coated sulfur-carbon mixture, and washing and drying the polydopamine-coated sulfur-carbon mixture; and (2) a battery, comprising the lithium-sulfur battery anode material with a polydopamine-coated three-dimensional network structure.