Insight into the synergetic effect of WO3 supported NiMoO4 nanocomposites application in high performance electrochemical supercapacitor

Abstract

Much emphasis has been paid to the investigation of electrode materials with improved electrochemical performance that are inexpensive and environmentally benign. WO3/NiMoO4 nanocomposites were synthesised varying the reaction temperatures (120, 150, and 180ºC) via the hydrothermal method to exploit the synergistic effect for charge storage performance.WO3/NiMoO4–120 nanocomposites displayed an outstanding specific capacitance of 875 Fg–1 at 1 Ag–1, whereas 150ºC and 180ºC exhibited lesser due to the morphology of WO3 collapsed at higher reaction temperature. However, the crystalline nature of the composites was retained. Furthermore, it has extraordinary dependability with over 90.48% capacitance retention after 5000 cycles and minimal charge transfer resistance. The composites exhibited high energy density (19.6 Wh kg−1 at a power density of 251.2 W kg−1), which is better than that of the individual components of WO3 nanocubes, and NiMoO4 nanosheets, are obtained. The outstanding electrochemical performance of the WO3/NiMoO4 nanocomposite is ascribed to the promising synergetic effect of NiMoO4 and WO3, which optimizes the material's potential as an electrode material by facilitating electron transport pathways. It implied that the WO3/NiMoO4 nanocomposites could be a promising candidate for use as high–performance Supercapacitors.