The amplified capacitance attained by the ANMC is attributed to the fact that as it contained the SBET of 2505.6 m 2 g -1 which is appreciably greater compared to OMC (1182.1 m 2 g -1 ) and NOMC (845.8 m 2 g -1 ). Fig. depicts the rate capability and coulombic efficiency of ANMC, OMC and NOMC based symmetric supercapacitors and ANMC symmetric cell attained the enhanced coulombic efficiency due to its porous nature. Furthermore, the ANMC derived symmetric cell achieved the energy density of 13.2 Wh Kg -1 in 1 M Na2SO4 aqueous solution with 98.5% retention of capacitance after 5000 cycles and higher compared to OMC and NOMC as displayed in Fig. . obtained the activated N-doped mesoporous carbon (ANMC) by solvent evaporation induced self-assembly (EISA) method and polymerisation of phenolic dicyanamide precursors followed by carbonization at 600 °C for 3 h and the subsequent activation with KOH in mass ratio of 1:4 at 800 °C for 2 h [765]. The preparation was carried out with different molar ratios of dicyanamide to phenol. Among the variety of combinations, the ANMC derived from the molar ratio of dicyanamide to phenol is equal to 1 (ANMC-1) produced the highest gravimetric capacitance of 388 F g -1 at 0.5 A g -1 in 1 M H2SO4