Abstract
Present work reports on improvements in supercapacitive performance of cobalt oxide by nickel incorporation. Nickel incorporated cobalt oxide get deposited on stainless steel at 573 K via aqueous route. The deposited samples were characterized structurally, morphologically and electrochemically by means of XRD, SEM, CV, CP and impedance. Deposited materials of all samples exhibits face centered cubic crystal structure having revolutionary morphologies. In electrochemical study all electrodes revealed mixed capacitive behavior, giving maximum specific capacitance 385.7 F/g at the scan rate 2 mV/s in 1 M KOH. Charge–discharge study depicts specific energy, specific power and columbic efficiency 9.98 Wh/kg, 2.28 kW/kg and 99.1% respectively. Electrochemical impedance study was scanned in the frequency range 1 mHz–1 MHz to search the internal resistance and capacitive behaviour of the samples.
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