▎ 摘　　要

NOVELTY - Preparing lithium-sulfur battery anode material comprises e.g. (i) preparing graphene oxide by Hummers method, and (ii) placing graphene oxide, nano-sulfur powder and boric acid in ball mill, ball milling to obtain homogeneous mixture of above three substances, ultrasonically dispersing mixture of graphene oxide, sulfur powder, boric acid and deionized water to obtain graphene oxide, sulfur powder and boric acid suspension, immersing suspension in a stainless steel reactor to obtain boron-doped graphene/sulfur composite three-dimensional structure of lithium-sulfur battery anode material. USE - The method is useful for preparing lithium-sulfur battery anode material (claimed). ADVANTAGE - The material has poor electrochemical performance and has low utilization rate. DETAILED DESCRIPTION - Preparing lithium-sulfur battery anode material comprises (i) preparing graphene oxide by Hummers method, and (ii) placing graphene oxide, nano-sulfur powder and boric acid in ball mill in a mass ratio of 1:1-10:1-3, ball milling using planetary ball mill, where ball material ratio is 2-4:1, ball milling at speed of 200-600 revolution/minutes for 6-8 hours to obtain homogeneous mixture of above three substances, where ratio between mixture and deionized water is 0.001-0.03:1, adding mixture into deionized water, ultrasonically dispersing mixture of graphene oxide, sulfur powder, boric acid and deionized water at 35-60 KHz at room temperature for 1-3 hours using ultrasonic disperser at room temperature to obtain graphene oxide, sulfur powder and boric acid suspension, immersing suspension in a stainless steel reactor at 100-300 degrees C for 10-15 hours, performing hydrothermal reaction to obtain hydrogel, washing hydrogel with deionized water at 50-90 degrees C for 3-5 times, freeze-drying washed product at minus 30-45 degrees C and vacuum of 10-20 Pa for 10-20 hours to obtain boron-doped graphene/sulfur composite three-dimensional structure of lithium-sulfur battery anode material, where mass fraction of sulfur in anode material of lithium-sulfur battery is 50.3-79.8%.