Controlled Synthesis of Cobalt Oxide Electrode by Electrodeposition for Supercapacitor Application
Cobalt oxide (Co3O4) electrodes were prepared on conductive stainless still (SS) substrate using cobalt nitrate as a cobalt source by implementing simple and cost-effective chemical electrodeposition method and here, characterized for structural and electrochemical analysis for supercapacitor applications. The effect of different deposition potential on capacitance and charging-discharging stability of cobalt oxide electrode were studied. X-ray diffractions confirms the face centered cubic crystal structure of Co3O4 electrodes. Electrochemical capacitive analysis of cobalt oxide electrode was studied in 1MKOH aqueous electrolyte solution. The observed maximum specific capacitance attained with cobalt oxide was 273.3 F/g at scan rate 5mV/s. The observed specific power, specific energy and coulomb efficiency were 12.12W/kg, 74.75 Wh/kg, and 99.63%, respectively. The cycling stability of the cobalt oxides shows 62% up to 500 cycles.
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