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

Abstract

In this study, b-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) 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) 2 /CuO electrode in the symmetric device shows a low energy (1.0 Wh/kg) and power (242 W/kg) density.

Enhanced electrochemical glucose sensing performance of CuO:NiO mixed oxides thin film by plasma assisted nitrogen doping

“…5b), the CV shows a reduction peak and a broad peak for both electrodes. The cathodic peak at 0.37 mV and 0.34 mV represent the active dissolution of nickel (or NiOOH/NiO transition) [48] In the presence of 1 mM glucose, the four developed electrodes i.e. CuO, NeCuO/Cu 2 O, CuO:NiO and NeCuO/Cu 2 O:NiO were able to oxidise glucose (Fig.…”

Optimizing the Supercapacitive Performance and Cyclability of Ni(OH)2 by Combining with CuO Concomitant with Mutual Doping

“…[17] The Ni(OH) 2 /CuO thin films prepared via a twostep chemical route only delivered a capacitance of 27 F g À 1 at 10 mV s À 1 and an energy density of 1.0 Wh kg À 1 at 242 W kg À 1 . [52] Thus the Ni(OH) 2 /CuO nanocomposite in the present work exhibits advantages both in the preparation process and in the electrochemical performance.…”

“…Vertically aligned Ni(OH) 2 /Cu 2 O nanosheets hydrothermally grown on porous NiCu alloy in H 2 O 2 aqueous solution exhibited capacitances of 8234 and 3318 mC cm −2 at 20 and 200 mA cm −2 , respectively . The Ni(OH) 2 /CuO thin films prepared via a two‐step chemical route only delivered a capacitance of 27 F g −1 at 10 mV s −1 and an energy density of 1.0 Wh kg −1 at 242 W kg −1 . Thus the Ni(OH) 2 /CuO nanocomposite in the present work exhibits advantages both in the preparation process and in the electrochemical performance.…”

Sucrose-derived carbon-coated nickel oxide (SDCC-NiO) as an electrode material for supercapacitor applications

“…This nanocomposite thin film exhibited the maximum specific capacitance of 27 F g À1 at a scan rate of 10 mV s À1 . 38 In this study, sucrose-derived carbon-coated nickel oxide (SDCC-NiO) has been investigated as an electrode material for supercapacitor applications. SDCC-NiO was fabricated using nickel oxide with the addition of sucrose.…”