Copper cobalt oxide microstructures resembling marigold flowers were created by solvothermal synthesis for high-performance supercapacitors

Abstract

The cathode electrode material for the battery-type CuCo2O4 electrode's hybrid supercapacitor applications was investigated. CuCo2O4 (MFCCO) microstructures resembling marigold flowers were created using a straightforward solvothermal procedure. X-ray diffraction (XRD), selected area electron diffraction (SAED) pattern, field emission scanning electron microscopy (FE-SEM), high-resolution transmission electron microscopy (HR-TEM), and X-ray photoelectron spectroscopy (XPS) were used to characterize the structure and morphology of the MFCCO. The flower-like shape, which comprised many nano-petals, was clearly visible in the FE-SEM image. Electrochemical experiments using the MFCCO electrode exhibit typical battery-type electrode materials. The CuCo2O4 electrode, which resembled a marigold flower, displayed good long-term cyclic stability and a maximum specific capacity of 627C g-1 at a current density of 0.5 A/g. The MFCCO electrode's high specific capacity, excellent cyclic stability, and low internal and charge transfer resistance supported the developed material's suitability as a positive electrode for hybrid supercapacitor applications.