Electrodeposited Bismuth Oxide Electrodes for Energy Storage Applications

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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.