High electrochemical performance of nanoflakes like CuO electrode by successive ionic layer adsorption and reaction (SILAR) method

The deposition of Cu(OH)2 hybrid and CuO thin films by SILAR method. [Display omitted] •First time reported CuO by SILAR method for supercapacitors.•Nanostructure of CuO.•Nanoflakes like CuO provide more surface area.•Nanoflakes like CuO show excellent supercapacitive. In this paper, we report the effect of annealing on hybrid nanoflower like Cu(OH)2/CuO thin film prepared by simple and low-cost successive ionic layer adsorption and reaction (SILAR) method. As synthesized and annealed sample have been used for the structural characterization by using X-ray diffraction (XRD) analysis techniques. After finding pure phase of CuO sample, we have to use these electrodes for electrochemical supercapacitive properties, like cyclic voltammetry (CV), galvanostatic charge/discharge (GCD), and electrochemical impedance spectroscopy (EIS). Results exhibited that, CuO nanoflakes exhibit the higher value specific capacitance 476F/g. Also, EIS studied to confirm lower ESR value, high power, performance, and excellent rate of CuO nanoflakes. Thus, present-day investigation effectively reports the applicability of facile and inexpensive SILAR method of synthesis of pure CuO nanostructure for the supercapacitor application.