Temperature Study on Vanadium Oxide Nano-Spheres As an Efficient Electrodes for Supercapacitor

Abstract

Due to the intermittence nature of renewable sources of energy, the research community has paid close attention to energy storage devices for ensuring the continuous supply of energy. Among the other transition metal oxides, V2O5 nanostructures have some inherent properties such as their layered structure, numerous oxidation states, low cost, ease of availability, and low toxicity, seems to fit to work as an electrode material for supercapacitor application. In the current study, V2O5 nanospheres were created using a solvothermal technique. To determine the ideal calcination temperature for the synthesis of V2O5 nanospheres, a thorough experimental examination was conducted. The resulting V2O5 nanospheres were thoroughly evaluated for their temperature-dependent morphological, structural, and compositional characteristics using a variety of cutting-edge analytical techniques, such as scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), and electron dispersive spectroscopy (EDS). The diameters of the nanospheres range from 1-2 micrometers, but their widths are only a few nm. The generated nanospheres electrochemical examination was performed using an aqueous LiCl electrolyte. The generated nanospheres exhibit a cyclic stability of 66% capacitance retention after 500 cycles and the maximum specific capacitance of about 360 F/g at 0.5 A/g. The exceptional reversibility and cyclic stability of the nanospheres were caused by the surface alteration brought on by calcination. The slower kinetics of electrode dissolving can be used to explain the improved cycle performance seen in this study as a result of the reduction in stress during the electrochemical reaction. Keyword: Supercapacitor, Vanadium Pentoxide, Energy storage, Electrochemistry.