Mild chemical-activated hydrothermal porous carbon derived from durian peel biomass for an electrochemical supercapacitor

The durian peels with ball/nanosheet structure presents good specific capacitance (267 F g −1 at 1 A g −1 ) in the three-electrode system. The Na 2 SO 4 -based symmetric supercapacitor shows the maximum energy density of 14.45 W h kg −1 at 225 W kg −1 .