▎ 摘　　要

NOVELTY - The invention relates to an ultra-high capacitor with high energy density and high power density, comprising an upper and lower cover, a spring piece. The model of the battery is CR2032, and are coated with a composite coating slurry prepared by mixing activated carbon/nitrogen-doped porous graphene/coagulant/adhesive agent on an aluminum substrate, and a separator. Select cellulose membrane made by Nippon Kodoshi Corporation and use 1M TEABF4/PC, the ultra-high capacitor prepared by the invention has a capacitance value of 122 F/g and a power density of up to 31 kW/Kg.