Effect of Temperature on Structural, Morphological and Electrochemical Properties of the Spray Pyrolysed CuO@Stainless-steel Electrodes Via Non-aqueous Route: Supercapacitive Approach
Abstract
In this work highly pure nano structured thin films of cupric oxide (CuO) were synthesised at various deposition temperatures from 250 to 400oC on stainless steel substrate by spray pyrolysis. Different analytical techniques and electrochemical measurements were used to study the effect of deposition temperature on physical and electrochemical properties of the prepared CuO material. The results showed that, along with morphological modifications, wettability and crystallinity of prepared polycrystalline CuO material increases with increase in deposition temperature. Further the enhanced specific capacitance (SC) with increase in deposition temperature confirmed that deposition temperature affect on the supercapacitive properties of the nano structured CuO material. High specific capacitance and low internal resistance of the trapezium shape nano grain like CuO material revealed its suitability as impressive candidates in supercapacitor applications. The highest assessed value of SC was 3285.7Fg−1 at 2 mVs−1 scan rate in 1 M aqueous KOH electrolyte. The galvanostatic charge discharge study reveals pseodocapacitive behaviour of the deposited CuO material.