Electrochemical performance of Bi₂WO₆/g-C₃N₄ (2D-2D) hybrid heterostructure as negative electrode materials for supercapacitor application

In this work, we have fabricated pseudocapacitor electrodes with 2D materials, including (Bi2WO6) and graphitic carbon nitride (g-C3N4)-based sandwich-like heterostructure by facile hydrothermal method. The synthesized Bi2WO6/g-C3N4 heterostructure nanocomposites were probed with different characterization techniques through X-ray diffraction (XRD), Raman spectroscopy, field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM) and X-ray photon spectroscopy (XPS). The combination of Bi2WO6 and Bi2WO(6)-g-C3N4 created a synergistic and complemental effect, which enhanced the electrochemical performance. Bi2WO6-g-C3N4-based electrode exhibited a specific capacitance of 158 mF/g at a current density of 1 mA/cm(2). Binary nanocomposites-based electrodes displayed enriched capacity retention (90%) indicating better supercapacitive performance.