▎ 摘　　要

NOVELTY - A lithium-sulfur battery comprises anode, cathode, septum and electrolyte, where the positive electrode forming a composite anode with a three-dimensional porous graphene-supported nano-lithium sulfide material, the septum is made of polyolefin material and the septum coated with oxidized graphene film to form a modified composite membrane, the cathode is made of lithium plate, and the electrolyte adopts 1 mol/L lithium bis (trifluoromethanesulfonyl) imide, 1-butyl-1-methyl-pyrrolidinium bis (trifluoromethanesulfonyl) imide salt, 1,3-dioxolane and ethylene glycol dimethyl ether. USE - Lithium-sulfur battery. ADVANTAGE - The lithium-sulfur battery has better effect of preventing sulfur anode dissolving, inhibiting shuttle effect, improved rate characteristics and better effect of cycle performance. DETAILED DESCRIPTION - A lithium-sulfur battery comprises anode, cathode, septum and electrolyte, the positive electrode forming a composite anode with a three-dimensional porous graphene-supported nano-lithium sulfide material, the septum is made of polyolefin material, coating the septum with oxidized graphene film to form a modified composite membrane, the cathode is made of lithium plate, and adopting the electrolyte 1 mol/L lithium bis (trifluoromethanesulfonyl) imide as solute, 1-butyl-1-methyl-pyrrolidinium bis (trifluoromethanesulfonyl) imide salt, 1,3-dioxolane and ethylene glycol dimethyl ether at a volume ratio of 1-2:1:1.