Effect of deposition potential and time substitution for Co(OH)2 on controlled synthesis and electrochemical performance for electrochemical supercapacitor

Interconnected nanoflakes of cobalt hydroxide Co(OH) 2 were deposited potentiostatically on nickel mesh (NM) at various potentials (− 0.9 V, − 1.0 V, − 1.1 V) and various times (1 min, 2 min, 3 min, 4 min, and 5 min). The FE-SEM, XRD, FT-IR, and EDS etc. studied the morphological and structural properties. The electrochemical properties evaluated in 1 M KOH electrolyte using cyclic voltammetry (CV), galvanostatic charge–discharge (GCD), and electrochemical impedance spectroscopy (EIS) techniques. The Co(OH) 2 nanoflakes deposited on nickel mesh with − 1.0 V for 5 min. electrode exhibits a good specific capacitance of 1035 F g −1 , at a current density of 1 mA cm −2 1 M KOH electrolyte. In conclusion, the deposition potential and the deposition time affect the surface morphology and the electrochemical performance of the deposited Co(OH) 2 electrode.