▎ 摘　　要

NOVELTY - Preparing and using 2,6-diaminoanthraquinone bifunctional group covalently grafted graphene comprises dispersing graphite oxide in deionized water under stirring for 1-2 hours in advance, and then performing ultrasonic treatment for 2-6 hours. 10-15 ml hydrazine hydrate is added at 80-110℃, and vacuum dried at 40-80℃ to obtain a reduced graphite oxide substrate. 2,6-Diaminoanthraquinone is dissolved in a dimethylformamide solution under stirring for 1-2 hours, added the reduced graphite oxide into the above solution under stirring for 2-4 hours, and then treated ultrasonic for 4-8 hours. The mixed solution is heated to 60-90℃, added isoamyl nitrite, and reacted for 18-24 hours. The reaction products are washed with ethanol and deionized water for multiple times, and finally freeze-dried to obtain the 2,6-diaminoanthraquinone bifunctional group covalently grafted graphene. USE - Method for preparing and using 2,6-diaminoanthraquinone bifunctional group covalently grafted graphene as a negative material for supercapacitor. ADVANTAGE - The graphene can be prevented from closely stacking together due to the effect of Van der Waals' force, which provides richer channels and more active sites for the permeation of electrolyte ions, so that the electrode material can fully contact the electrolyte ions to improve the pseudocapacitance properties of the material.