Facile Hydrothermal Synthesis of Nickel Manganese Oxide/Activated Carbon nanowires as electrode material for Supercapacitors

Abstract

Nickel Manganese oxide Nanowires has been established as a promising electrode material. Nickel-Manganese oxide (NMO) nanowires were synthesized using a facile hydrothermal approach followed by annealing treatment. For a comparative study, Manganese oxide (NMO), Nickel manganese oxide, and activated carbon composite were also synthesized by the same method to examine the effect of doping for comparative study. The composition, structure and morphology of the samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM).The electrochemical performanceof the material were examined by cyclic voltammetry (CV), and galvanostatic charge-discharge (GCD). NMO nanowires exhibit specific capacitance of 1634.4Fg -1 at 1Ag -1, and After 10000 cycles, the specific capacitance of Ni-MnO2 was still maintained at 96.5%, which shows excellent cycling stability. The results show that doping had a great influence on the electrochemical properties of the materials. Doping of nickel cation enhances the electrochemical performance of electrode material. NMO is a promising candidate for future energy storage devices.