respectively. The hydrogen reduced heteroatom doped carbon showed 25% lower specific capacitance than that of heteroatom doped carbon, which was ascribed to the reduced oxygen content in the carbon material. The plot of specific capacitance versus cycle number is depicted in Fig. . The effect of surface oxygen on the electrochemical performance of the heteroatom doped carbon electrodes were studied via EIS measurements, and observed the decreased intrinsic conductivity in DC due to the breakdown of aromatic conjugated structure from sp 2 to sp 3 upon the doping of oxygen. Further, the contact angle test resulted in smaller contact angle of heteroatom doped carbon, which suggested the between surface wettability of doped carbon to the electrolyte than that of reduced carbon electrode. On its conclusion, the doped oxygen is found to reduce the intrinsic conductivity of carbon electrodes, whereas it has proven to improve the wettability and thus enhances the utilization of carbon surface and results in pseudocapacitive contribution.