An insight into synergistic effect of polyaniline and noble metal (Ag) on vanadium pentoxide nanorods for enhanced energe storage performance

Abstract

The widespread applications of vanadium pentoxide (V₂O₅) are limited because of its low electrical conductivity and restricted ion diffusion coefficient. To address these constraints, the present study includes a straightforward and effective approach for fabricating polyaniline based silver-decorated vanadium pentoxide (Ag–V₂O₅/PANi) as an electrode material. The structural and morphological investigation of prepared electrode materials were made by X-ray diffraction analysis and scanning electron microscopy respectively. In comparison to pure Ag–V₂O₅, the Ag–V₂O₅/PANi composite demonstrated enhanced performance in various aspects. Specifically, the Ag–V₂O₅/PANi showed a higher specific capacitance (628 Fg⁻¹) when subjected to a current density (1 Ag⁻¹) in KOH electrolyte. Additionally, it has an energy density of 153 Whkg⁻¹. Furthermore, the Ag–V₂O₅/PANi composite exhibited superior stability even after undergoing 3000 charge to discharge cycles. Exceptional capabilities shown can be ascribed to synergistic interaction between PANi and Ag–V₂O₅. The remarkable outcomes obtained from these electrode materials have the potential to foster novel prospects in high-energy-density storage systems.