The SBET of the NCMSs were determined from BET analysis, which showed that NCMSs-900 possessed the highest SBET of 727.1 m 2 g -1 , compared to that of NCMSs-700 (388.6 m 2 g -1 ), NCMSs-800 (480.7 m 2 g -1 ), and NCMSs-1000 (202.4 m 2 g -1 ), indicating the porous nature of NCMSs. The XPS of NCMSs showed the presence of only carbon, and nitrogen atoms, confirming the incorporation of N atoms into the as-prepared NCMSs. The total content of N atoms was found to be decreased with the increase in pyrolysis temperature. In detail, NCMSs-700 showed 4.35 at% of N atoms, which was decreased to 3.25% for NCMSs-800, 1.86% for NCMSs-900, and finally to 1.08% for NCMSs-1000. Further, as the pyrolysis temperature increased from 700 to 1000 ˚C, the N/C atomic ratio was significantly decreased from 0.057 to 0.011, which indicated the loss of total N content with higher pyrolysis temperature. The NCMSs electrode was fabricated as supercapacitor electrode materials, and electrochemical performance was measured in a three-electrode cell with 0.1 M KOH electrolyte solution. The plot of specific capacitance versus scan rate (Fig. ), displayed the higher specific capacitance value of 414 F g -1 at NCMSs-90 compared to NCMSs-700 (342 F g -1 ), NCMSs-800 (413 F g -1 ), and NCMSs-1000 (330 F g -1 ), and pristine poly(o-methylaniline) (41 F g -1 ).