▎ 摘　　要

NOVELTY - Preparation of octahedral cobalt sulfide-graphene composite electrode material comprises mixing graphene dispersion, cobalt nitrate solution and acetone, hydrothermal reacting, centrifuging, adding sodium sulfide aqueous solution, hydrothermal reacting, centrifuging, washing, and drying. USE - Method for preparing octahedral cobalt sulfide-graphene composite electrode material. ADVANTAGE - The material has high specific surface area, improved conductivity, large specific capacity and excellent cycle performance.