▎ 摘　　要

NOVELTY - Preparing graphene/carbon black composite material involves: placing graphite oxide in 5-10 l deionized water to form graphite oxide solution having concentration of 0.5-2 mg/ml, and then ultrasonic processing the graphite oxide solution, adding 0.05-1 g carbon black, continuously ultrasonic processing, filtering and drying to form graphene oxide/carbon black composite material (M1); placing the material (M1) in carbon dioxide and inert gas atmosphere, sintering at 80-1100 degrees C for 2-3 hours, then cooling at room temperature to form graphene/carbon black composite material. USE - For preparation of graphene/carbon black composite material which is used as electrode material for electrochemical capacitors (claimed). ADVANTAGE - The present method provides graphene/carbon black composite material having high energy storage capacity.