To meet the demand for ever-increasing energy storage and conversion, it is most important to fabricate high-performance electrodes by matching the electrode materials to nanostructural design. In this research, for the first time, unique hierarchical [email protected]₂(CO₃)(OH)₂ heterogeneous nanowire arrays were successfully constructed onto the nickel foam by a simple two-step soft-chemical approach for application as electrodes of supercapacitors. NiSe nanowires with superior conductivity were designed for builting in situ onto the Ni foam to exert their electrochemical properties, and more importantly, to serve as a bridge for high-speed electron transport between the electroactive material and the current collector. Furthermore, Co₂(CO₃)(OH)₂ nanowires were horizontally constructed onto a vertical NiSe precursor to form a 1-D heterostructure, which provided more electrochemically active sites and significantly increased the space utilization of the current collector surface. In particular, abundant pores and heterogeneous interfaces existed in the heterogeneous network that were composed of interlaced nanowires, which worked well with the inherently superior conductivity of the selenide material to provide a fast dual-channel for electrolyte penetration and electron transportation. Moreover, the hierarchical electrode achieved an outstanding areal specific capacitance of 9.56 F cm⁻² (at 4 mA cm⁻²) and a rare capacitance retention of 68.1% (current density increased from 4 to 80 mA cm⁻²). A hybrid supercapacitor of [email protected]₂(CO₃)(OH)₂//AC was assembled and exhibited competitive energy density and power density, confirming its potential as a promising electrode for next-generation electrochemical energy storage.

为了满足不断增长的能量存储和转换的需求，最重要的是通过使电极材料与纳米结构设计相匹配来制造高性能电极。在这项研究中，首次通过简单的两步软化学方法成功地在泡沫镍上成功构建了独特的分层[受电子邮件保护] ₂（CO ₃）（OH）₂异质纳米线阵列，以用作超级电容器的电极。具有优异电导率的NiSe纳米线被设计用于在Ni泡沫上原位构建以发挥其电化学性能，更重要的是，它充当电活性材料和集电器之间高速电子传输的桥梁。此外，Co ₂将（CO ₃）（OH）₂纳米线水平构建在垂直NiSe前驱体上以形成1-D异质结构，该异质结构提供了更多的电化学活性位并显着提高了集电器表面的空间利用率。特别是，在由交错的纳米线组成的异质网络中存在大量的孔和异质界面，这些界面与硒化物材料固有的优越电导率很好地配合，为电解质渗透和电子传输提供了快速的双通道。此外，分层电极实现了出色的面积比电容9.56 F cm ^-2（在4 mA cm ^-2时）。）和68.1％的罕见电容保持率（电流密度从4 mA增加到80 mA cm ^-2）。组装了[电子邮件保护] ₂（CO ₃）（OH）₂ // AC的混合超级电容器，并显示出有竞争力的能量密度和功率密度，从而证实了其作为下一代电化学能量存储有希望的电极的潜力。