▎ 摘　　要

NOVELTY - Preparing hollow cobalt sulfide/graphene composite material involves adding cobalt nitrate hexahydrate and glycerin to isopropanol to perform hydrothermal reaction to obtain cobalt-glycerin complex. The obtained cobalt-glycerol complex is dispersed in an alcohol solvent, and then add a surface charge modifier to perform charge modification under ultrasonic conditions to obtain a negatively charged cobalt-glycerol complex. The graphene oxide is uniformly dispersed in the alcohol solvent, then added obtained negatively charged cobalt-glycerol complex, and dispersed it ultrasonically to obtain a mixed solution. The thioacetamide is added to obtained mixed solution and performed hydrothermal reaction to obtain a hollow ball cobalt sulfide/ graphene composite material. USE - Method for preparing hollow cobalt sulfide/graphene composite material used in lithium battery cathode material. ADVANTAGE - The method enable to prepare hollow cobalt sulfide/graphene composite material is used for assembling a battery, so that the battery has excellent cycle stability performance and rate performance.