Fabrication and characterization of Sb₂O₃-MoS₂nanocomposites for high performance supercapacitor applications

Binary nanocomposite-based electrodes have been studied extensively in recent times owing to their multiple oxidation states, excellent physico-chemical features, and combined morphology, which are suitable for increasing the electrochemical performance of supercapacitors. The present work deals with Sb₂O₃-MoS₂nanocomposites electrode for supercapacitor applications. The x-ray diffraction (XRD), Raman, scanning electron microscope (SEM), energy dispersive x-ray (EDX), high-resolution transmission electron microscopy (HRTEM), selected area electron diffraction (SAED) and x-ray photoelectron spectroscopy (XPS) characterizations have been studied to analyze the phase formation, vibrational modes, morphology, elemental composition and binding energies of the prepared Sb₂O₃-MoS₂nanocomposites electrode material, as well as their electrochemical measurements such as cyclic voltammetry (CV), galvanostatic charge-discharge (GCD), and electrochemical impedance spectroscopy (EIS) have been analyzed. The developed Sb₂O₃-MoS₂nanocomposites electrode provides a high specific capacitance of 454.3 F g^-1at the current density of 1 A g^-1. Further, the hybrid supercapacitor device has been constructed which shows 104.04 F g^-1of specific capacitance at 2 A g^-1and manifests a good energy density of 24.42 Wh kg^-1at a power density of 1299.89 W kg^-1. Additionally, the hybrid device Sb₂O₃-MoS₂//AC exhibits a good capacitive retention of 90.6% and a coulombic efficiency of 100.45% at 10 A g^-1over 8000 cycles.