CuO/CeAlO3 nanocomposite with enhanced electrocapacitive performance for supercapacitor applications

Abstract

Developing an efficient system is essential for energy storage, especially sustainable sources of energy, which have expanded significantly in the last few years. However, the fabrication of effective materials proves an aid to solve such crises of high cost and low specific capacitance. Transition and inner transition metal oxides play a significant role in energy storage as well as energy conversion systems. In this research, a novel material CuO/CeAlO3 nanocomposite is synthesized by sonication technique for supercapacitor applications. The different physical methods including X-ray diffractometer (XRD), Raman and Scanning Electron Microscopy (SEM) were employed to analyze the phase purity, structure as well as morphology of the prepared electrode. Electrochemical investigations concluded that the CuO/CeAlO3 nanocomposite exhibited specific capacitance of 1091.98 F/g, high energy density of 56.26 Wh/kg, high power density of 304.55 W/kg at 1 A/g current density as well as high cyclic stability after 5000th cycle with lower charge transfer resistance of 0.09 Ω. The electrochemical characteristics of CuO/CeAlO3 nanocomposite were improved because of the increased area of surface, large active sites and decreased resistance that resulted from the addition of CeAlO3 with CuO. This research showed the great potential of CuO/CeAlO3 nanocomposite along with inexpensive fabrication cost and could be used in next-generation energy storage systems.