| 要約: | Abstract Recently, three‐dimensional‐structure materials have attracted enormous attention in energy‐storage fields on account of their excellent electrochemical performance. In this study, hierarchical nanospheres consisting of mesoporous CoO@CuO nanowires on a three‐dimensional conductive Ni foam are prepared by a one‐step hydrothermal method combined with a subsequent annealing process. Compared to CoO or CuO alone, the as‐obtained CoO@CuO/Ni hybrid nanowires show good electronic conductivity owning to the abundant existence of O vacancies in them. In a three‐electrode system, the area capacitance of the prepared CoO@CuO/Ni electrode reaches 2.94 F cm−2 (1.32 C cm−2) at 1 mA cm−2, and the CoO@CuO/Ni electrode presents an outstanding cycle performance. Moreover, a CoO@CuO/Ni//AC ASC asymmetric supercapacitor is fabricated and found to display a high energy density of 20.22 Wh kg−1 at 800 W kg−1. Hence, this novel CoO@CuO/Ni hybrid nanowires with excellent electrochemical properties shows outstanding potential in the practical application of high‐energy storage devices.
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