▎ 摘　　要

NOVELTY - A graphene based super capacitor preparing method involves treating crystalline flake graphite with strong acid and expanding rapidly at 900-1000 degrees C, ultrasonic stripping the crystalline flake graphite with strong acid in ultrasonic reactor for 6-8 hours, washing and drying the obtained product to obtain graphene electrode material. USE - Method for preparing a graphene based super capacitor. ADVANTAGE - The method enables preparing graphene based super capacitor with better conductivity and adsorption active point, large surface area and excellent capacitor property.