Novel Copper Doped Nickel Oxide Nanocrystalline Electrode Materials for Electrochemical Capacitor Applications

Abstract

Ni_1-xCu_xO_1-δ (where x = 0, 0.05, 0.10, 0.15 and 0.20) nanoparticles were prepared by chemical precipitation method. The XRD patterns revealed the formation of well-crystalline single phase FCC geometry. From FTIR spectra, the peaks appeared at 3400 − 3700 cm⁻¹ are assigned to O-H bonds and the peaks appeared at 500 cm⁻¹ are due to M-O vibration bonds. SEM photographs indicated the presence of spherical grains in the samples. The electrochemical characteristics of the materials were studied by cyclic voltammetry in 6 M KOH. The highest capacitance of 1269.5 Fg⁻¹ was obtained for Ni_0.80Cu_0.20O_1-δ electrode at the scan rate of 10 mVS⁻¹.

Keywords:

• Cu doped NiO electrodes
• chemical synthesis
• physical characterization
• cyclic voltammetry
• supercapacitors

Acknowledgements

The authors thank Karunya Institute of Technology and Sciences (KITS) for promoting nanomaterials chemistry based research activity in the Department of Applied Chemistry. Also, the authors thank KITS for providing necessary research facilities to carry out this research work.