Hydrothermal Synthesis and Pseudocapacitive Performance of β-NiMoO4 Nanorods

 In this research, nanostructured nickel molybdate (NiMoO4) active material was successfully synthesized by a simple hydrothermal route. Structural characterizations were performed using X-Ray Diffraction (XRD) and Fourier Transform Infrared Spectroscopy (FTIR), and surface morphology of the as-prepared material was obtained by Field Emission Scanning Electron Microscopy (FESEM). The results showed that the as-prepared electrode material has a nanometric and rod-shaped structure and their crystal structure was β-phase. Electrochemical evaluations using cyclic voltammetry at various potential scanning rates and galvanostatic charge-discharge at various current densities show that nickel molybdate active material has the high specific capacitance of 730 F g-1 at a current density of 1 A g-1 and a capacity retention of about 63.2 % even with a 10-fold increase in current density to 10 A g-1. The obtained results imply that the as-synthesized NiMoO4 nanorods could be a promising candidate as electrode material for high performance supercapacitors.