Nano-Crystalline Cadmium Oxide Thin Films for Supercapacitor Application: Effect of Solution Concentrations

Single-step electrodeposition method was employed for the deposition of innovative, nanostructured thin films of cadmium oxide at ambient temperature utilizing various solution concentrations.Deposited films ware annealed at 400 0 C operating temperature for 4 hours.Prepared Cadmium oxide (CdO) thin films show cubic crystal structure.The morphological investigation shows porous and granular surface morphologies.The obtained maximum specific capacitance (SC) is 476.69Fg -1 at a 5mV/S scan rate for a 0.2 M electrode in a 1 M aqueous KOH electrolyte solution.Specific Energy is 3.86 Whkg -1 , Specific power is 0.64 kWkg -1, and electrochemical impedance spectroscopy (EIS) analysis is carried out in the frequency range of 1 mHz to 1 MHz.