Design and Synthesis of Hybrid Mo-Doped Bi₂O₃ Nanomaterials as an Efficient Electrodes for High-Performance Supercapacitors

Abstract

The major concern with efficient supercapacitors still lies in the increase of capacitive performance and maximum stability. Consequently, in most cases conventional materials are unable to fulfil the required condition and characteristics for better performance. In present work, the Mo-doped Bi₂O₃ hybrid nanomaterials were prepared as a superior electrode material for supercapacitors to address the current issue. The Pure Bi₂O₃ and (1%, 3% and 5% wt.) MoO₄-doped Bi₂O₃ nanomaterials were prepared via sol-gel methodology. The synthesized nanomaterials were confirmed by spectral, microscopic and X-ray characterization techniques. The SEM analysis confirmed the formation of refined cubes as defined for the nanomaterials. Cyclic voltammetry, galvanostatic charge discharge, and electrochemical impedance spectroscopy were utilized to assess electrochemical excellence of prepared nanomaterials. Furthermore, the pure Bi₂O₃ depicted capacitance value of about 548 F/g, whereas 1% MoO₄@Bi₂O₃ showed capacitance about 675 F/g. Moreover, the 3% MoO₄@Bi₂O₃ nanomaterial showed excellent performance with specific capacitance of 988 F/g at 1 A/g. The 3 % MoO₄@ Bi₂O₃ electrode was also tested for columbic efficiency. The electrode material explored significant efficiency about 89% at 2500^th cycles. The present research visualized that the 3% MoO₄@Bi₂O₃ is a reliable electrode material for the advancement in next generation supercapacitors with better capacity, stability & scalability.