Nanofiber NiMoO<sub>4</sub>/g-C<sub>3</sub>N<sub>4</sub> Composite Electrode Materials for Redox Supercapacitor Applications
Kannadasan Thiagarajan,
Thirugnanam Bavani,
Prabhakarn Arunachalam,
Seung Jun Lee,
Jayaraman Theerthagiri,
Jaganathan Madhavan,
Bruno Georges Pollet,
Myong Yong Choi
Affiliations
Kannadasan Thiagarajan
Solar Energy Lab, Department of Chemistry, Thiruvalluvar University, Vellore 632 115, India
Thirugnanam Bavani
Solar Energy Lab, Department of Chemistry, Thiruvalluvar University, Vellore 632 115, India
Prabhakarn Arunachalam
Electrochemistry Sciences Research Chair (ESRC), Chemistry Department, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
Seung Jun Lee
Department of Chemistry and Research Institute of Natural Sciences, Gyeongsang National University, Jinju 52828, Korea
Jayaraman Theerthagiri
Department of Chemistry and Research Institute of Natural Sciences, Gyeongsang National University, Jinju 52828, Korea
Jaganathan Madhavan
Solar Energy Lab, Department of Chemistry, Thiruvalluvar University, Vellore 632 115, India
Bruno Georges Pollet
Hydrogen Energy and Sonochemistry Research Group, Department of Energy and Process Engineering, Norwegian University of Science and Technology (NTNU), NO-7491 Trondheim, Norway
Myong Yong Choi
Department of Chemistry and Research Institute of Natural Sciences, Gyeongsang National University, Jinju 52828, Korea
NiMoO4/g-C3N4 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 NiMoO4/g-C3N4 material. The electrochemical responses of pristine NiMoO4 and the NiMoO4/g-C3N4 nanocomposite material were investigated by cyclic voltammetry (CV), galvanostatic charge-discharge (GCD) and electrochemical impedance spectroscopy (EIS). From the CD studies, the NiMoO4/g-C3N4 nanocomposite revealed a higher maximum specific capacitance (510 Fg−1) in comparison to pristine NiMoO4 (203 Fg−1). In addition, the NiMoO4/g-C3N4 composite electrode material exhibited high stability, which maintained up to 91.8% capacity even after 2000 charge-discharge cycles. Finally, NiMoO4/g-C3N4 was found to exhibit an energy density value of 11.3 Whkg−1. These findings clearly suggested that NiMoO4/g-C3N4 could be a suitable electrode material for electrochemical capacitors.
