Nanofiber NiMoO4/g-C3N4 Composite Electrode Materials for Redox Supercapacitor Applications

摘要

NiMoO /g-C N 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 /g-C N material. The electrochemical responses of pristine NiMoO and the NiMoO /g-C N nanocomposite material were investigated by cyclic voltammetry (CV), galvanostatic charge-discharge (GCD) and electrochemical impedance spectroscopy (EIS). From the CD studies, the NiMoO /g-C N nanocomposite revealed a higher maximum specific capacitance (510 Fg ) in comparison to pristine NiMoO (203 Fg ). In addition, the NiMoO /g-C N composite electrode material exhibited high stability, which maintained up to 91.8% capacity even after 2000 charge-discharge cycles. Finally, NiMoO /g-C N was found to exhibit an energy density value of 11.3 Whkg . These findings clearly suggested that NiMoO /g-C N could be a suitable electrode material for electrochemical capacitors.