In three-electrode configuration using 6 M KOH electrolyte, the NHPC electrode activated at 800 ˚C, performed high specific capacitance of 440 F g -1 at 0.5 A g -1 , with a cycling stability of 94.8% of its initial capacitance after 3000 cycles at 20 A g -1 . In two-electrode system, the electrode performed a specific capacitance from 331 F g -1 at 1 A g -1 to 266 F g -1 at 20 A g -1 current density with a rate capability of 80.4%. The higher specific capacitance of NHPC activated at 800 ˚C is attributed to the large specific SBET and high nitrogen doping content.