Abstract Providing a good contact between electroactive materials and their substrates is an important factor for developing supercapacitors. In our work, a Graphene (Gr)/cuprous oxide (Cu2O) nanocomposite film was directly fabricated on a Cu foil by a simple one-step electrodeposition approach. The obtained binder-free electrode (referred as Gr-Cu2O nanocomposite/Cu foil) was directly used as a working electrode for supercapacitors. The electrochemical evaluations in 6 M KOH show that the electrode has the specific capacitance of 161.31 F g−1 at a scan rate of 10 mV s−1 and 124.70 F g−1 at a current density of 1 mA mg−1. The enhanced electrochemical performance of the electrode originates from the synergistic cooperation between its two components. In addition, the corrosion behavior of the as-fabricated electrode in 6 M KOH showing an enhanced corrosion resistivity in Cu foils in the presence of the Gr-Cu2O nanocomposite. Eventually, a 2 V asymmetric supercapacitor cell was assembled by the Gr-Cu2O nanocomposite/Cu foil as a positive electrode and the Gr/Cu foil as a negative electrode in 1 M TEA-BF4 in acetonitrile, which exhibits the maximum specific capacitance and energy density of 11.94 F g−1 and 6.63 Wh kg−1 at 10 mV s−1, respectively.

中文翻译：

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铜箔上高性能石墨烯/Cu2O纳米复合薄膜的一步电沉积合成作为无粘合剂超级电容器电极

摘要 提供电活性材料与其基材之间的良好接触是开发超级电容器的重要因素。在我们的工作中，石墨烯（Gr）/氧化亚铜（Cu2O）纳米复合薄膜通过简单的一步电沉积方法直接在铜箔上制造。获得的无粘合剂电极（称为 Gr-Cu2O 纳米复合材料/铜箔）直接用作超级电容器的工作电极。在 6 M KOH 中的电化学评估表明，电极在 10 mV s-1 的扫描速率下具有 161.31 F g-1 的比电容，在 1 mA mg-1 的电流密度下具有 124.70 F g-1 的比电容。电极增强的电化学性能源于其两个组件之间的协同作用。此外，制备好的电极在 6 M KOH 中的腐蚀行为表明，在存在 Gr-Cu2O 纳米复合材料的情况下，Cu 箔的耐腐蚀性能增强。最终，以 Gr-Cu2O 纳米复合材料/铜箔作为正极，Gr/Cu 箔作为负极在 1 M TEA-BF4 乙腈溶液中组装了一个 2 V 非对称超级电容器电池，表现出最大的比电容和能量在 10 mV s-1 下的密度分别为 11.94 F g-1 和 6.63 Wh kg-1。