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Reduced graphene oxide/nickel oxide/polyaniline (GNP) was prepared by a two-step method. First, the reduced graphene oxide/nickel oxide composite material is prepared, and then the conductive polyaniline is loaded on the surface. The electrode materials were characterized by XRD, Raman spectra, TEM and HRTEM. Adopting a three electrode test system, the electrochemical properties of the materials were measured by cyclic voltammetry, constant current charge/discharge and AC impedance. The results showed that the characteristic peaks of graphene oxide were not detected in the XRD spectra of the reduced graphene oxide/nickel oxide composite, which shows that graphene oxide films with good dispersity was obtained in the process of the composite. High resolution transmission electron microscopy shows that the reduced graphene oxide / nickel oxide/polyaniline with a rough surface, indicating that the polyaniline was successfully loaded on the reduced graphene oxide/nickel oxide surface. The specific capacitance of GNP is 638Fg. Under the current density is 500 mA g, the specific capacitance maintained 100% after 1000 cycles while it reduced only 9% after 5000 cycles.

Reduced Graphene Oxide/Nickel Oxide/Polyaniline: Preparation and Properties Investigation as Supercapacitor Electrode Material