▎ 摘　　要

NOVELTY - Preparing metal alloy/carbon tube/graphene-loaded sulfur composite anode material involves preparing carbon nanotube/graphene composite material carbon nanotube and graphene in mass ratio of 2:1 in ethanol solvent, ultrasonically dispersing uniformly and drying. The carbon nanotube/graphene composite material and sulfur composite material is prepared by adding obtained composite material with elemental sulfur and mix according to mass ratio of 1:1-4, milling mixture uniformly, and grind mixture to uniform mass ratio of 1:10-15 add carbon disulfide to mixture. USE - Method for preparing metal alloy/carbon tube/graphene-loaded sulfur composite cathode material which is used in lithium-sulfur battery (claimed). ADVANTAGE - The method enables to prepare metal alloy/carbon tube/graphene-loaded sulfur composite cathode material which does not dissolve polysulfide ions in liquid electrolyte during charging and discharging of lithium-sulfur battery and effectively inhibits shuttle effect, increases Coulomb efficiency and cycle stability of lithium-sulfur battery. DETAILED DESCRIPTION - Preparing metal alloy/carbon tube/graphene-loaded sulfur composite anode material involves preparing carbon nanotube/graphene composite material carbon nanotube and graphene in mass ratio of 2:1 in ethanol solvent, ultrasonically dispersing uniformly and drying. The carbon nanotube/graphene composite material and sulfur composite material is prepared by adding obtained composite material with elemental sulfur and mix according to mass ratio of 1:1-4, milling mixture uniformly, and grind mixture to uniform mass ratio of 1:10-15 add carbon disulfide to mixture, then placing at 10-30 degrees C to completely volatilize carbon disulfide, and remaining substance is kept in oven at 120-160 degrees C for 8-12 hours,then cooling to room temperature to obtain carbon nanotube graphene-sulfur composite material. The obtained composite anode material is mixed with carbon black, polyvinylidene fluoride according to mass ratio of 1:0,05-0.25:0.05-0.15, then adding N-methyl pyrrolidone and alloy, stirring and ultrasonic dispersing uniformly, controlling viscosity at 1000-10000 centiPoise to obtain slurry. The slurry obtained is uniformly coated on the current collector aluminum foil thickness of 150-400 mm, then transferring the foil to 40-60 degrees C oven to dry to obtain desired product.