The increased capacitance of 156 F g -1 at 10 mV s -1 in N2-saturated 0.5 M H2SO4 at 25 °C was obtained for the NOMC prepared at 800 which is because of enriched nitrogen doping level of 8.2 at. % along with larger SBET of 622 m 2 g -1 implying that the SBET, capacitance and the nitrogen content diminishes upon increasing the annealing temperature. More fascinatingly as well as impressively, the authors too discussed about the impact of nitrogen content on the Helmholtz areal capacitance and demonstrated that the linear increase of Helmholtz capacitance was observed with the content of nitrogen because of variation in interaction between nitrogen and oxygen functionalities thereby lessening the thickness of the double ). The improved performance was due to the higher N content of 11.64 wt. % eventhough the SBET (m 2 g -1 ) of OMC is found to be 553 which is higher than NOMC (320). From Fig. , it is clearer that the ratio of capacitance retained versus frequency response was better for NOMC compared to OMC proposing that the ion penetration is easier for former. The durability studies revealed that it exhibits the 7% of increment in capacitance after 10000 cycles at 2 A g -1 and clearly exhibited in Fig. . OMC, NOMC and POMC due to existence of heteroatom. Thus, the obtained NPOMC attained the gravimetric capacitance of 210 F g -1 at 1 A g -1 in 6 M KOH aqueous solution which is higher than NOMC (148 F g -1 ), POMC (162 F g -1 ) and OMC (107 F g -1 ) as evidently observed from Fig. . It was apparent that the gravimetric capacitance of NPOMC is higher than NOMC which might be ascribed to the fact that the SBET of NPOMC (1968 m 2 g -1 ) is greater than NOMC (1275 m 2 g -1 ). On the otherhand, the gravimetric capacitance of NPOMC is higher than POMC although the SBET of POMC is highest among the three samples (2282 m 2 g -1 ). This is due to the fact that the enhanced pseudocapacitance is shown by the presence of three the highest gravimetric capacitance of 377 F g -1 at 0.2 A g -1 in 1 M H2SO4 aqueous solution.