Graphene, polyaniline and graphene nanosheets(GNS)/polyaniline(PANI) nanocomposite are fabricated on steel by constant current electrochemical method in aniline monomer and SDS surfactant.The characterization of synthesized catalysts have been investigation by FT-IR,SEM techniques.The GNS/PANI composites exhibit better electrochemical performances than the pure individual components. A remarkable specific capacitance of 1100 F g−1 (based on GNS/PANI composites) is obtained at a scan rate of 5 mV s−1 in 0.5 M H2SO4 solution compared to 380 F g−1 for pure PANI and 200 F g−1 for GNS. The excellent performance is not only due to the GNS which can provide good electrical conductivity and high specific surface area. The resulting composites are promising electrode materials for high-performance electrical energy storage devices
