Electrodeposited Bismuth Oxide Electrodes for Energy Storage Applications

The present topic is focused on the synthesis of bismuth oxide thin films on different substrates using the electrodeposition technique. Prepared samples were annealed at 573 K and further used for physical and electrochemical characterizations. The structural investigations of the prepared samples show polycrystalline nature with a tetragonal crystal structure. Morphological analysis shows spruce leaves with nano-rod-type architecture morphology. All samples show hydrophilic nature. Specimens for electrochemical analysis were scanned by CV in 1 M KOH on numerous scan rates, starting from 1 to 100 mV/s. The obtained maximum value of specific capacitance (SC) is 1742.79 F/gm. at a scan rate of 2 mV/s in 1 M KOH with a potential window (– 1.0 V to 0.8 V) vs. Ag/AgCl and acquired maximum value of specific energy and specific power was 56.68 Wh/Kg and 2.94 kW/kg at 10 mA/cm2 . The Nyquist plot shows the internal resistance of the optimized electrode. The final optimized sample will be used for the energy storage supercapacitor application.

Keywords: Bismuth Oxide, Bi₂CuO₄, Charge-discharge, Cyclic voltammetry, Electrodeposition, Electrochemical characterization, Energy, Electrolyte, EDAX, Electrode, Impedance, Mapping, Power, Stability, Substrates, SEM, Specific capacitance, Supercapacitor, Thin film, XRD.