Electrochemical performance of Bi 2 WO 6 /g-C 3 N 4 (2D–2D) hybrid heterostructure as negative electrode materials for supercapacitor application

In this work, we have fabricated pseudocapacitor electrodes with 2D materials, including (Bi 2 WO 6 ) and graphitic carbon nitride (g-C 3 N 4 )-based sandwich-like heterostructure by facile hydrothermal method. The synthesized Bi 2 WO 6 /g-C 3 N 4 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 Bi 2 WO 6 and Bi 2 WO 6 -g-C 3 N 4 created a synergistic and complemental effect, which enhanced the electrochemical performance. Bi 2 WO 6 -g-C 3 N 4 -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.