Decoration of g-C₃N₄ with hydrothermally synthesized FeWO₄ nanorods as the high-performance supercapacitors

Highly crystalline FeWO₄ nanorods (FWO NRs) prepared by a hydrothermal reaction is combined with g-C₃N₄ (gCN) nanosheet as an electrode material for the supercapacitor. Fabricated nanocomposites were analysed using X-ray diffraction (XRD), diffuse reflectance spectroscopy (DRS), transmission electron microscopy (TEM), X-ray photoelectron microscopy (XPS), and Raman Spectroscopy. Pseudocapacitive performance of the FWO/gCN nanocomposite was evaluated by cyclic voltammetry (CV), electrochemical impedance and galvanometric experiments in an alkaline medium. Thus FWO/gCN nanocomposite exhibited a high specific capacitance of 357 F g⁻¹ at 5 mV s⁻¹ and demonstrated a superior long-term cyclic stability, with the specific capacitance retention of about 80% after 1000 cycles.