▎ 摘　　要

NOVELTY - Preparing lithium sulfur battery graphene composite sulfur anode sheet involves mixing aluminum nitride, boron oxide, zirconium dioxide, clay and absolute ethyl alcohol to obtain first mixture, grinding first mixture to nano-grade, drying to obtain dry powder, mixing with PTFE emulsion with mass concentration of 12% to obtain mixture B, coating mixture B on glass substrate to form thin layer with thickness of 10-100 mu m, drying and forming film, uncovering film, heating film layer to 800-850 degrees C for 1-2 hours, sintering for 10-10 minutes at 1400-1500 degrees C to obtain microporous ceramic film. The mass ratio of aluminum nitride, boron oxide, zirconium dioxide, clay and absolute ethyl alcohol is 4-15:2-4:10-15:60-85:20-35. The mass ratio of PTFE emulsion and dry powder is 5:1. The sulfur elementary substance, carbon disulfide and graphene are dispersed into slurry. The slurry is coated on microporous ceramic film at 40-50 degrees C. The slurry is permeated with microporous ceramic film. USE - Method for preparing lithium sulfur battery graphene composite sulfur positive pole piece. ADVANTAGE - The method enables preparing the graphene composite sulfur anode sheet with improved circulation stability and capacity conservation rate of the sulfur anode. DETAILED DESCRIPTION - Preparing lithium sulfur battery graphene composite sulfur anode sheet involves mixing aluminum nitride, boron oxide, zirconium dioxide, clay and absolute ethyl alcohol to obtain first mixture, grinding first mixture to nano-grade, drying to obtain dry powder, mixing with PTFE emulsion with mass concentration of 12% to obtain mixture B, coating mixture B on glass substrate to form thin layer with thickness of 10-100 mu m, drying and forming film, uncovering film, heating film layer to 800-850 degrees C for 1-2 hours, sintering for 10-10 minutes at 1400-1500 degrees C to obtain microporous ceramic film. The mass ratio of aluminum nitride, boron oxide, zirconium dioxide, clay and absolute ethyl alcohol is 4-15:2-4:10-15:60-85:20-35. The mass ratio of PTFE emulsion and dry powder is 5:1. The sulfur elementary substance, carbon disulfide and graphene are dispersed into slurry. The slurry is coated on microporous ceramic film at 40-50 degrees C. The slurry is permeated with microporous ceramic film. The temperature is reduced. The sulfur crystal is separated out to load nano-particles on graphene. The carbon disulfide is heated to remove carbon disulfide to obtain composite layer of graphene sulfur. The aluminum layer is evaporated on two sides of composite layer of graphene sulfur to obtain lithium sulfur battery graphene composite sulfur anode sheet.