As the temperature rises, then proportionately oxygen functionalities are getting decreased due to the reduction of oxygen-based functionalities such as carboxyl. epoxy and carbonyl groups at higher temperature. The increment in the capacitance of N-doped graphene is correlated to the pseudocapacitance behaviour experienced by the heteroatom functionalities such as nitrogen and oxygen bearing groups. However, the hierarchical honey-comb morphology was damaged because of the fact that the amination performed at higher temperature. As a result, the pore volume corresponding to the sample prepared at 400 and 600 °C are 3.32 and 3.17 cm 3 g -1 , respectively. These values are comparatively lower than the sample prepared at 200 °C which suggesting that the temperature has significant impact on the porosity of the material which in turn affects the electrochemical performance .