▎ 摘　　要

NOVELTY - A super capacitor interconnected graphene nanosheet is prepared by taking nano magnesium oxide template, putting in mortar, adding potassium hydroxide activating agent, grinding, transferring to beaker, adding coal tar carbon source and N,N-dimethylformamide, dissolving, stirring, ultrasonicating for 1 hour, placing in corundum porcelain, pumping argon gas, heating at 150 degrees C for 30 minutes, adjusting heating rate to 5 degrees C/min for 800-1000 degrees C for 1 hour, cooling, taking out, crushing, adding dilute hydrochloric acid, washing to neutral with distilled water, and drying. USE - Method for preparing super capacitor interconnected graphene nanosheet (claimed). ADVANTAGE - The nanosheet has electrode material capacity retention rate of 83.3%, 20 A/g current density and specific volume of 261 F/g.