Nanofiber NiMoO(4)/g-C(3)N(4) Composite Electrode Materials for Redox Supercapacitor Applications

NiMoO(4)/g-C(3)N(4) was fabricated by a hydrothermal method and used as an electrode material in a supercapacitor. The samples were characterized by XRD, FTIR, scanning electron microscopy (SEM) and transmission electron microscopy (TEM) to study the physical and structural properties of the as-prepared NiMoO(4)/g-C(3)N(4) material. The electrochemical responses of pristine NiMoO(4) and the NiMoO(4)/g-C(3)N(4) nanocomposite material were investigated by cyclic voltammetry (CV), galvanostatic charge-discharge (GCD) and electrochemical impedance spectroscopy (EIS). From the CD studies, the NiMoO(4)/g-C(3)N(4) nanocomposite revealed a higher maximum specific capacitance (510 Fg(−1)) in comparison to pristine NiMoO(4) (203 Fg(−1)). In addition, the NiMoO(4)/g-C(3)N(4) composite electrode material exhibited high stability, which maintained up to 91.8% capacity even after 2000 charge-discharge cycles. Finally, NiMoO(4)/g-C(3)N(4) was found to exhibit an energy density value of 11.3 Whkg(−1). These findings clearly suggested that NiMoO(4)/g-C(3)N(4) could be a suitable electrode material for electrochemical capacitors.