OICC Press International Journal of Nano Dimension 2228-5059 15 4 (October 2024) 2024 10 10 Synthesis of Copper and Cobalt Oxide nanoparticles for enhanced Supercapacitor applications 1 11 10.57647/j.ijnd.2024.1504.28 EN Damodaram Vandana Reddy Jawaharlal Nehru Technological University Anantapur, Ananthapuramu, Andhra Pradesh, India, 515002 0000-0002-9103-4454 Chindukuri Maneesha Jawaharlal Nehru Technological University Anantapur, Ananthapuramu, Andhra Pradesh, India, 515002 0000-0002-4557-322X Lakshmana Naik Ramavathu Indian Institute of Technology Jodhpur, Rajasthan, NH 62 Nagaur Road, Karwar, Jodhpur, India, 342037 0000-0001-7325-0893 Bala Narasaiah Tumma Jawaharlal Nehru Technological University Anantapur, Ananthapuramu, Andhra Pradesh, India, 515002 0000-0002-3420-8585 Journal Article 2024 10 10 This research paper presents a comprehensive study on the synthesis of copper oxide (CuO), cobalt oxide (Co3O4), and their hybrid nanoparticles via the sol-gel method for enhanced supercapacitor applications. The resulting materials were characterized using techniques such as X-ray diffraction (XRD), scanning electron microscopy (SEM), UV-Vis, Dynamic Light Scattering (DLS) and electrochemical measurements. The average particle size of CuO, Co3O4 nanoparticles and CuO/Co3O4 nanocomposite is found from XRD as 18.5 nm, 18.1 nm, and 17.5 nm respectively. The electrochemical performance of the synthesized nanoparticles was evaluated using cyclic voltammetry (CV). The CuO nanoparticles exhibited a specific capacitance of 204 F/g, while Co3O4 showed a specific capacitance of 252 F/g at a scan rate of 5 mV/s. The CuO-Co3O4 hybrid nanoparticles demonstrated a synergistic effect, with a specific capacitance of 384 F/g, outperforming the individual oxide counterparts.