Abstract A new three-dimensional (3D) porous nano-Ni-Cu foam/electrochemically reduced Graphene Oxide (ERGO) electrode for high performance supercapacitors is represented. In this study, Graphene Oxide (GO) in the form of nanosheets was deposited (0 V to −1.5 V vs. Saturated Calomel Electrode (SCE)) and reduced by cyclic voltammetry method under different scan rates in the range of 10–100 mV/s on Ni-Cu foam. Raman spectroscopy and X-ray photoelectron spectroscopy (XPS) indicated that the graphene structure was considerably restored in ERGO. ERGO deposited at the electrochemical scan rate of 50 mV/s presented the best capacitance performance. Notably, a high specific capacitance of the 1380.2 F/g at a discharge rate of 2 A/g and also an energy density of 30.01 W h kg−1 at a power density of 10.2 kW/kg was achieved for fabricated nano-Ni-Cu foam/ERGO composite film. Moreover, the designed composite provided an excellent cycling stability, which is a very important requirement for being used as electrodes for high-performance supercapacitors. This work introduces the 3D porous nano-Ni-Cu foam/ERGO procedure an impressive approach in the direction of supercapacitors with high energy and power densities.

中文翻译：

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三维多孔纳米泡沫镍铜电极一步法电沉积还原氧化石墨烯及其在超级电容器中的应用

摘要 介绍了一种用于高性能超级电容器的新型三维 (3D) 多孔纳米镍铜泡沫/电化学还原氧化石墨烯 (ERGO) 电极。在这项研究中，纳米片形式的氧化石墨烯 (GO) 被沉积（0 V 至 -1.5 V 与饱和甘汞电极（SCE）），并在 10-100 mV 范围内的不同扫描速率下通过循环伏安法还原/s 在镍铜泡沫上。拉曼光谱和 X 射线光电子能谱 (XPS) 表明，ERGO 中的石墨烯结构得到了显着恢复。以 50 mV/s 的电化学扫描速率沉积的 ERGO 表现出最好的电容性能。值得注意的是，在 2 A/g 的放电速率下具有 1380.2 F/g 的高比电容，在 10 的功率密度下具有 30.01 W h kg-1 的能量密度。制备的纳米镍铜泡沫/ERGO 复合膜达到了 2 kW/kg。此外，设计的复合材料提供了优异的循环稳定性，这是用作高性能超级电容器电极的一个非常重要的要求。这项工作介绍了 3D 多孔纳米镍铜泡沫/ERGO 程序，这是一种在具有高能量和功率密度的超级电容器方向上令人印象深刻的方法。