Aceton Treated Crumpled Graphene For High Performance Supercapacitor

Crumpled graphene (A-GR) is prepared by a modified Hummers method and a simple solvent aceton treatment. A-GR is wrinkle structure and shows excellent electrochemical behaviors in both aqueous and organic electrolytes. For A-GR, a capacitance of 431 F/g and energy density of 21.6 Wh/kg are acquired in alkali electrolyte, while those values are 169 F/g and 48.7 Wh/kg respectively in organic electrolyte. After 1000 cycles of galvanostatic charge/discharge tests, over 93% and 84% of the original capacitance can be retained in alkaline and organic electrolytes.