Well-integrated bismuth trioxide nanotriangles on carbon cloth as a flexible faradic electrode for supercapacitor applications

Abstract

The development of redox-active and binder-free materials using facile synthesis methods has attracted great attention in the fabrication of high-performance energy storage devices. In this work, we have used a simple electrochemical deposition method for the direct growth of bismuth trioxide nanostructures on carbon cloth (Bi2O3/CC) for electrochemical supercapacitors (SCs). The as-synthesized Bi2O3 electrode appeared to be triangle-shaped nanostructures with robust adhesion and good crystallinity on a flexible CC electrode. The binder-free Bi2O3/CC electrode has been directly used as an SC electrode, which demonstrated battery-type redox behavior with high electrochemical performance. The low charge transfer resistance (3.9 Ω) of the binder-free Bi2O3/CC electrode demonstrated a specific capacity of 105.5C/g at a current density of 1 A/g with good rate capability at 12 A/g. Moreover, Bi2O3/CC showed good cycling stability of 70.6 % after 2000 consecutive charge-discharge cycles. Considering the simple and direct growth of anode materials, this work could unlock the enormous potential for the development of negative electrode material in hybrid SCs with excellent energy storage properties.