Synergistic effect of CoWO₄ and g-C₃N₄ nanohybrid as reliable electrode for high performance supercapacitor

In this work, CoWO₄/’x’ g-C₃N₄ nanostructures were synthesized through a facile hydrothermal method. The structural, vibrational, and morphological properties of the prepared samples were characterized by powder XRD, FT-IR, and SEM analysis techniques. The results revealed the prepared sample possesses a monoclinic crystal structure and flower-like morphology without impurities. It has been shown that incorporating different quantities of g-C₃N₄ nanosheets into CoWO₄ modifies its electrochemical characteristics by merging the redox activity of the metal tungstate host with the significant electrical conductivity of the g-C₃N₄ component. Among the prepared samples CoWO₄/’x’ g-C₃N₄ (x = 1.0) electrode material has a high surface area, large electrical conductivity, and exhibited better electrode/electrolyte interaction. The electrochemical tests were performed on CoWO₄/’x’ g-C₃N_4, (x composition = 0.5, 1.0, 2.0) where CWCN-10 exhibited a remarkable electrochemical performance with a high specific capacitance of 1092 Fg⁻¹ at 5 mV/s with good stability over 5000 cycles. Hence, the proper optimization of carbon composite can effectively enhance the performance of metal tungstate as electrode material for supercapacitor application.