Hybrid supercapacitors are considered as one of the most promising next-generation energy storage devices, owing to high-energy, high-power density, and long-cycle life. In this work, a simple and low-cost fabrication method of the nanostructured anode with a high capacity and power is proposed for fabrication of high-performance hybrid supercapacitors. This is achieved by a one-step in-situ growth of numerous copper nanopillars on a commercially available copper foil though the galvanic displacement reaction in an aqueous ionic solution. The copper nanopillar forest-based structure with a high surface area, ion accessibility, and electron transportability provides excellent current collecting characteristics for the anode of a lithium-ion battery. The electrochemical performance of a Li half-cell incorporating the copper nanopillar-based current collector exhibits a high capacity (880 mAh g^− 1 at 0.2 °C), excellent rate capability, and extremely high durability (97% after 1000 cycles). These results show that the fabricated anode structure can improve the electrochemical performance of the hybrid supercapacitors. To demonstrate the feasibility of an alternative power source, the full cell was fabricated by combining the copper nanopillar anode and an activated carbon cathode. This device provided a high energy density (98.9 Wh kg^− 1 at 248 W kg^− 1), high power density (7018 W kg^− 1), and long-cycle life (> 1000 cycles).

由于高能量，高功率密度和长寿命，混合超级电容器被认为是最有前途的下一代储能设备之一。在这项工作中，提出了一种简单且低成本的具有高容量和功率的纳米结构阳极的制造方法，用于制造高性能混合超级电容器。这是通过在离子水溶液中通过电流置换反应，在市售铜箔上一步一步地生长大量铜纳米柱而实现的。具有高表面积，离子可及性和电子传输性的基于铜纳米柱森林的结构为锂离子电池的负极提供了出色的集电特性。⁻在0.2°C下为¹），出色的速率能力和极高的耐用性（1000次循环后为97％）。这些结果表明，制造的阳极结构可以改善混合超级电容器的电化学性能。为了证明替代电源的可行性，通过组合铜纳米柱阳极和活性炭阴极制造了整个电池。（98.9瓦公斤此装置提供高的能量密度^{- 1}在248公斤w ^ ^{- 1}），高功率密度（7018千克w ^ ^{- 1}），和长的循环寿命（> 1000个循环）。