▎ 摘　　要

NOVELTY - Lithium-sulfur battery positive electrode material comprises a multi-dimensional carbon skeleton and its internal pores and sulfur attached to surfaces, and a layer of emerald green wrapped on the outer surface. The multi-dimensional conductive carbon skeleton structure is obtained by reasonably selecting and matching carbon particles, carbon tubes and graphene. The sulfur attached to the carbon skeleton and its internal pores is obtained by controlling the ratio of reactants and by chemical reaction. The conductive polyaniline coating layer is obtained by precisely controlling the reaction conditions. The mass fraction of sulfur in the material is 80-92%. The mass fraction of carbon is 5-18%. USE - Lithium-sulfur battery positive electrode material. ADVANTAGE - The lithium-sulfur battery positive electrode material uses surface carbon skeleton structure to effectively improve and enhance the conductivity of the composite cathode material, enhance the rapid transport of electrons, and thus ensure high utilization of sulfur. The emerald-imide-based polymer coating layer provides additional electron transport paths, alleviates the volume change of the cathode material, effectively suppresses the flying shuttle effect, and thus ensures the high energy density and long cycle life of lithium-sulfur batteries. The material can be prepared in a simple and cost-effective manner. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing lithium-sulfur battery positive electrode material, which involves placing 10.0-20.0 g 0-dimensional carbon particles, 1-dimensional carbon tubes and 2-dimensional graphene in a beaker, adding 500-1500 ml ethanol and 300-600 ml water under stirring and mixing under ultrasonic conditions, adding 10-30 mL phosphoric acid and aniline solution to the dispersion liquid in a water bath under stirring, placing 8-25.0 g ammonium persulfate and 200-500 ml water in a beaker, using peristaltic pump to pump the ammonium persulfate solution into the carbon powder, adding 2-5 liter ethanol solution into the dispersion system under stirring, adding 300-500 g sodium sulfide nonahydrate, 5-15 liter water, and 100-300 g sulfur powder in a suitable container under stirring, mixing 300-500 mL concentrated hydrochloric acid and add 600-1000 mL water under stirring and dissolving, simultaneously pumping two kinds of solutions into the system that is dispersed with carbon powder, filtering the reaction system dispersion to get filter cake, putting the filter cake washed to neutrality in a beaker, adding ethanol solution under stirring and dispersing, adding 100-150 g polyvinylpyrrolidone (K-30 or K-50) and 300-600 mL water under stirring at 40-60℃, adding completely dissolved polyvinylpyrrolidone solution directly into the beaker in which the neutral filter cake is dispersed, adding 100-150 ml concentrated phosphoric acid and suitable volume of aniline, placing 15-25 g ammonium persulfate and 200-300 ml water to fully stir and dissolve, pumping ammonium persulfate solution under stirring to control the temperature of the reaction system accurately during the whole reaction process, filtering the dispersion system after the reaction is completed to get filter cake, washing the filter cake, and finally transferring the washed to neutral filter cake to 50-80℃ to get the target material.