Nickel hydroxide nanoflakes with α-phase structure were prepared using a simple chemical precipitation method with the assistance of Triton X-100. The structure and morphology of the obtained nanoflakeswere characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and field emission scanning electron microscopy (FESEM). Cathodic electrophoretic deposition (EPD) technique is used to fabricate porous pure nickel hydroxide film on nickel substrate from ethanolic suspensions using triethanolamine (TEA) as a dispersant. Finally, the deposited electrodes are heated at 350 °C for 3 h to form NiOelectrode. The energy storage performance of the prepared electrode as supercapacitor electrode was evaluated by cyclic voltammetry (CV) and galvanostatic charge-discharge (GCD) examinations in 6 M KOH aqueous solution at various current rates.
