Solid-State Microwave Synthesis CuO/CNT: A High-Performance Electrode Material for Supercapacitors

CuO/CNT composites were synthesized via simple and rapid microwave approach. The nanocomposites were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). Further, the electrochemical performances of CuO/CNT composites were evaluated. The prepared samples displayed high specific capacitances of 164.5 F g − 1 at 1 A g − 1 , during the cycle process, the capacitance value aggrandized to 274.7 F g − 1 , and the capacitance remained at 166% of the primary value after 10 000 turns. Moreover, the CuO/CNT//AC asymmetric supercapacitor (ASC) exhibited an energy density of 17.08 Wh kg − 1 at 775 W kg − 1 and excellent electrochemical stability in 6M KOH aqueous electrolyte, showing its enormous potential in energy-storage devices.