▎ 摘　　要

NOVELTY - Preparation of cobalt/graphene oxide composite involves subjecting graphene to ultrasonic dispersing step in deionized water, stirring, slowly dripping aqueous solution of cobalt acetate, adding lithium hydroxide aqueous solution, performing ultrasonic treatment for 2 hours, increasing temperature, stirring, performing centrifugation and water washing, drying, calcining under inert gas protection, and obtaining cobalt/graphene oxide composite. USE - Preparation of cobalt/graphene oxide composite for lithium ion battery cathode material. ADVANTAGE - Cobalt/graphene oxide composite can be easily prepared and can improve performance of batteries.