▎ 摘　　要

NOVELTY - Forming graphene/carbon black composite material involves: placing graphite oxide in 0.5-5 l deionized water to obtain 0.5-2 mg/ml graphite oxide solution, then processing graphite oxide solution under ultrasonic treatment, adding 0.2-1.5 g carbon black into graphite oxide solution, continuously ultrasonic processing, filtering, drying to obtain graphene oxide/carbon black complex, placing the obtained complex in an inert gas atmosphere at 70-90 degrees C, sintering at low temperature for 30 minutes/hour, cooling to room temperature, and obtaining a graphene/carbon black composite material. USE - For the preparation of graphene/carbon black composite material which is used as electrode active material in an electrochemical capacitor (claimed). ADVANTAGE - The method provides graphene/carbon black composite material by using oxidation-reduction method which is simple and convenient to operate, and easily achieves large-scale industrial production.