Nickel-cobalt binary oxide/reduced graphene oxide (NiCo/N-RGO) composite with high capacitance is synthesized via mild method for electrochemical capacitors. As an appropriate matrix, RGO is beneficial to form homogeneous structure and improve the electron transport ability. Graphene is synthesized from graphite electrodes using ionic liquid-assisted electrochemical exfoliation. Herein, we report the synthesis and electrochemical properties of heteroatoms -doped reduced graphene oxide (NRGO) supported Co, Ni and NiCo nanocomposites. We demonstrate the efficient doping of reduced graphene oxide (RGO) by hetroatoms and its capacitive performance was calculated by cyclic voltammetry and charge–discharge cycling in 6M KOH solution.
