Hierarchical nanoporous activated carbon as potential electrode materials for high performance electrochemical supercapacitor

Hierarchical nanoporous activated carbon materials directly derived from “Indian Cake Rusk” food waste exhibits high specific capacitance of 381.0 F g-1 at current density of 1.7 A g−1 after 6000 cycles in aqueous electrolytes under three-electrode set up, while 47.1 Wh Kg−1 and power density of 22644 W kg−1 in non-aqueous electrolyte with two electrode configuration.292