▎ 摘　　要

NOVELTY - A cobalt manganese oxide/reduced graphene oxide composite material preparing method involves adding a certain amount of reduced graphene oxide to 5-100 ml of deionized water, ultrasonic for 20 minutes-3 hours, stirring at room temperature under a magnetic stirrer, rotate at 200-300 r/minutes, stirring time 0.5-2 hours, weighing the appropriate amount of potassium permanganate, cobalt (II) acetate and manganese (II) acetate, adding to reduced graphene oxide solution under stirring conditions, and stirring evenly for 0.5-3 hours to form the precursor, adding the precursor solution to the reaction vessel, performing a hydrothermal reaction at 100-250 degrees C, after the reaction is completed, naturally cooling to room temperature, subjecting the solution to suction filtration, washing the mixture repeatedly with deionized water and absolute ethanol for 3-5 times and drying a certain temperature for 6-24 hours to obtain the finished product. USE - Method for preparing cobalt manganese oxide/reduced graphene oxide composite material using electrode material. ADVANTAGE - The method enables preparing cobalt manganese oxide/reduced graphene oxide composite material with large specific surface area, better conductivity, improving the specific capacity of the super capacitor, multiplying power performance, electrochemical stability, better electrochemical performance, simple and cost effective manner.