Improvement of Electrochemical Properties of Ni/CuO Nanocomposites for Efficient Supercapacitor Applications

In this work, Ni@CuO nanocomposites were prepared via the low-temperature hydrothermal method for supercapacitor applications. The formation of Ni@CuO nanocomposite have been confirmed by XRD, FTIR, SEM, BET and XPS techniques. X-ray diffraction peaks were revealed the cubic structure of the Ni@CuO nanoparticles with calculated crystallite size value of 11.37 nm, whereas the SEM images revealed the spherical-like surface morphology of synthesized products. Fourier transform infrared spectrum (FTIR) studies exhibit the presence of chemical bonds, vibrating at characteristic frequencies and vibrational bands at 1000 cm–1 ascribed to the metal bonds. The chemical bonding/oxidation state effects were considered by XPS analysis. CV measurement of Ni@CuO electrode shows a high Csp value obtained of 374 F/g at 10 mV/s. Over modified synthesized powder material showed significant enhancement in stability and showed the maximum retention value of 88.54% prepared electrode. Furthermore, the EIS measurement exposed the outstanding rate capability and reversible nature. This work gives a new pathway and highly desirable to development of high-performance pseudocapacitance nature and is suitable material for electrode fabrication of the Ni@CuO nanocomposite.