ABSTRACT Porous copper oxides/reduced graphene oxide (CuO-Cu2O/rGO) microspheres composite was first prepared by a simple and environmentally friendly one-step hydrothermal method. The influences of graphene oxide (GO) on the ratio of CuO and Cu2O and the corresponding electrochemical performance of the composite were investigated systematically. It was found that when the ratio of CuO and Cu2O is about 1:5 by controlling GO adding amount, the composite exhibits excellent electrochemical performance, such as high specific capacitance (470 F·g−1 at a current density of 1 A·g−1), excellent rate capability (85.9% of capacity retention as current density increases from 1 to 10 A·g−1) and long cycle stability (81.3% of capacity retention after 5000 cycles at a current density of 1 A·g−1). Therefore, the porous high-performance CuO–Cu2O/rGO microspheres composite has a great potential for supercapacitor applications.

中文翻译：

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可控合成多孔CuO-Cu2O/rGO微球复合材料作为超级电容器的高性能电极材料

摘要 多孔氧化铜/还原氧化石墨烯（CuO-Cu2O/rGO）微球复合材料首次采用简单环保的一步水热法制备。系统地研究了氧化石墨烯（GO）对CuO和Cu2O的比例以及相应的复合材料电化学性能的影响。结果表明，通过控制 GO 的添加量，CuO 和 Cu2O 的比例约为 1:5 时，复合材料表现出优异的电化学性能，如高比电容（470 F·g-1，电流密度为 1 A·g -1)、优异的倍率性能（电流密度从 1 增加到 10 A·g-1 时容量保持率为 85.9%）和长循环稳定性（1 A·g- 电流密度下 5000 次循环后容量保持率为 81.3%） 1）。所以，