A g -1 . The same trend is too obeyed for SBET values which is mentioned as NMC/SG (1039.65 m 2 g -1 ) > NMC (790.89 m 2 g -1 ) > OMC (481.32 m 2 g -1 ). Thus, the presence of both heteroatom functionalities as well as the larger SBET are believed to be accountable for the amplified capacitance by the hybrid. % achieved the highest gravimetric capacitance of 232.2 F g -1 at 2 A g -1 in 6 M KOH aqueous solution along with reasonable SBET of 495.9 m 2 g -1 . Fig. revealed that the higher area under the CV curve was observed for the NMC-700 based symmetric supercapacitor and too consistent with GCD profile as shown in Fig. . Additionally, the symmetric cell derived from NMC-700 accomplished the energy density of 15.3 Wh Kg -1 if the power density delivered is 399.9 W kg -1 . Zhang et al. fabricated the 2D GO @ NMC by polymerisation of 2, 6-diaminopyridine with GO and copolymer (PSn-b-PEO117) in presence of APS under appropriate polymerisation conditions followed by carbonization at 350 °C for 3 h and 700 °C about 1h in the atmosphere of N2 gas . Out of various sets, the hybrid of GO and NMC-1 at 700 °C submitted the highest gravimetric capacitance of 256 F g -1 at 0.2 A g -1 in 6 M KOH aqueous solution along with superb cyclability achieving 100% of capacitance retention after 5000 cycles. The excellent capacitance was attributed to (i) high SBET of 324 m 2 g -1 as well as reasonable nitrogen content of 18.9 wt. %. and (ii) amplified pseudocapacitance by the pyridinic and pyrrolic nitrogen. polymerisation of phenol-formaldehyde resin followed by annealing at variety of temperatures resulting in the formation of abundant mesopores . The synthesis was performed by varying the dosages of PVP at fixed temperature of 800 °C and also by altering the carbonization temperatures with fixed ration of PVP and PF resin in 1:1. Out of different ratios of PVP and PF resin at 800 °C, the NMC-1 derived gave the highest specific capacitance of 203 F g -1 at 0.5 A g -1 in 6 M KOH aqueous solution. Among the different temperatures, the NMC-1 at 1000 °C produced the highest capacitance of 315 F g -1 at 0.5 A g -1 which is due to the higher SBET of 2448 m 2 g -1 . Moreover, the NMC-1 at 1000 °C displayed the energy density of 12.1 Wh Kg -1 along with 88.9% of retention of capacitance after 10000 cycles at 2 A g -1 by two-electrode system. Indeed, strong interaction between PVP and PF resin happened through H-bonding and electrostatic interaction. After annealing, the PVP undergoes decomposition that generates uniform mesoporous distribution leading to the formation of NMC with high SBET.