N-doped honeycomb-like porous carbon towards high-performance supercapacitor

We report a grape-based honeycomb-like porous carbon (GHPC) prepared by KOH activation and carbonization, followed by N-doping, which exhibits a capacitance of 275 F/g at 0.5 A/g in a three-electrode cell. Moreover, the NGHPC//NGHPC symmetric supercapacitor displays a high energy density of 12.6 Wh/kg, and excellent cycling stability of approximately 95.2% capacitance retention after 5000 cycles at 5 A/g.

Source: Chinese Chemical Letters - February 14, 2020 Category: Chemistry Source Type: research