A novel chemical preparation of Ni(OH)^sub 2^/CuO nanocomposite thin films for supercapacitive applications

• Published in: Journal of materials science. Materials in electronics Vol. 26; no. 4; p. 2236
• Main Authors: Iwueke, D C, Amaechi, C I, Nwanya, A C, Ekwealor, A B; C, Asogwa, P U, Osuji, R U, Maaza, M, Ezema, F I
• Format: Journal Article
• Language: English
• Published: New York Springer Nature B.V 01.04.2015
• ISSN: 0957-4522; 1573-482X
• DOI: 10.1007/s10854-015-2674-3

In this study, [beta]-phase nickel hydroxide with a hexagonal brucite structure has been meshed with successive ionic layer adsorption and reaction deposited cupric oxide. The nanocomposite was characterized by X-ray diffraction, scanning electron microscopy and UV-Vis-NIR spectroscopy. The electrochemical performances of the nanocomposite Ni(OH)^sub 2^/CuO supercapacitor were tested by cyclic voltammetry, galvanostatic charge-discharge and electrochemical impedance spectroscopy tests in 1 M KOH solution. With the potential window between 0 and 0.5 V, a maximum specific capacitance ~27 F/g was observed at a scan rate of 10 mV/s. Moreover, Ni(OH)^sub 2^/CuO electrode in the symmetric device shows a low energy (1.0 Wh/kg) and power (242 W/kg) density.