▎ 摘　　要

NOVELTY - Graphene/polyimide-based nitrogen-doped carbon aerogel, where the aerogel is crosslinked with a polyamic acid using graphene oxide, potassium hydroxide is added to obtain a hydrogel, and an aerogel is obtained by aging and lyophilization, and then the aerogel is carbonized and activated, and then mixed with urea to obtain secondary carbonization. USE - Graphene/polyimide-based nitrogen-doped carbon aerogel. ADVANTAGE - The graphene/polyimide-based nitrogen-doped carbon aerogel has better rate performance and higher capacitance performance, simple synthesis process and simple operation. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing a graphene/polyimide-based nitrogen-doped carbon aerogel, which involves dispersing graphene oxide in deionized water, ultrasonicating to obtain a graphene oxide dispersion, adding a water-soluble poly Amidic acid, stirring to obtain a graphene oxide/polyamic acid hydrogel, where the concentration of the graphene oxide dispersion is 2-5 mg/mL, and the mass ratio of graphene oxide to the water-soluble polyamic acid is 1:20-50, adding a potassium hydroxide solution to the graphene oxide/polyamic acid hydrogel, stirring to obtain a potassium hydroxide/graphene oxide/polyamic acid hydrogel, freezing, drying, obtaining potassium hydroxide/graphene oxide/polyamic acid aerogel, where the mass ratio of potassium hydroxide to the water-soluble polyamic acid is 1:2-5, activating the potassium hydroxide/graphene oxide/polyamic acid aerogel to obtain an activated carbon aerogel, mixing the mixture with urea at a mass ratio of 1:1-1:10, carbonizing to obtain a graphene/polyimide-based nitrogen-doped carbon aerogel.