In another report, the formation of N-doped graphene was performed by thermal pyrolysis of silica decorated graphene and 1-ethyl-3-methylimidazolium dicyanamide as the source of nitrogen at 700 °C for 1 h under nitrogen atmosphere . Thus, the obtained Ndoped graphene has the highest doping content of nitrogen of 13.51 wt% and the specific capacitance of 206 F g -1 at 0.1 A g -1 in 1 M H2SO4 solution. It has been proposed that the interaction of N atom with protons from sulphuric acid electrolyte causing the significant pseudocapacitive nature which give rise to the augmented capacitance. Additionally, the unique two-dimensional porous nanoarchitecture furnishes shorter paths for the diffusion of electrolyte and large exposed surface generating the more active sites for electric double-layer charge storage and redox reactions. Zhao et al. prepared the 3D N-doped graphene in two-step process . First, the aqueous GO suspension was mixed with 5 vol% pyrrole and subjected to hydrothermal heat-treatment at 180 °C for 12 h to yield a gel. And then, the gel thus obtained was subjected to freeze-drying accompanied by thermal annealing at 1050 °C for 3 h. The Ndoped graphene framework has displayed the specific capacitance of 484 F g -1 in 1 M LiClO4 aqueous electrolyte which is relatively superior compared to typical carbon-based electrodes.