In this paper, the hierarchical porous carbon coated nickel cobalt sulphide (NiCo₂S₄@HPC) nanowire composites in situ grown on Ni foam have been fabricated by a facile two-step hydrothermal method. The HPC with three-dimensional interconnected macroporous framework not only improves the structural stability subject to repeated charge-discharge cycles, but also enhances the conductivity and facilitates the rapid charge storage of NiCo₂S₄. When evaluated as an electrode material for supercapacitor, the NiCo₂S₄@HPC composite electrode exhibits a superior specific capacitance (1682.5 F/g at the current density of 1 A/g) and high cycling stability of 93.7 % capacitance retention after 2000 cycles at 1 A/g, which are superior to most reported NiCo₂S₄-based electrode materials, confirming the outstanding electrochemical performance of the NiCo₂S₄@HPC composite electrode. The present work not only proves the NiCo₂S₄@HPC nanowire composite to be an excellent electrode material for supercapacitors, but also promotes the practical applications of NiCo₂S₄-based composite materials in high-performance energy storage devices.

在本文中，通过简单的两步水热法制备了在泡沫镍上原位生长的分层多孔碳包覆镍钴硫化物（NiCo ₂ S ₄ @HPC）纳米线复合材料。具有三维互连大孔骨架的HPC不仅提高了重复充放电循环下的结构稳定性，而且提高了导电性并有利于NiCo ₂ S ₄的快速电荷存储。当评估作为超级电容器的电极材料时，NiCo ₂ S ₄@HPC 复合电极表现出优异的比电容（在 1 A/g 的电流密度下为 1682.5 F/g）和高循环稳定性，在 1 A/g 下循环 2000 次后电容保持率为 93.7%，优于大多数报道的 NiCo ₂ S ₄基电极材料，证实了NiCo ₂ S ₄ @HPC 复合电极的出色电化学性能。目前的工作不仅证明了NiCo ₂ S ₄ @HPC纳米线复合材料是一种优异的超级电容器电极材料，而且促进了NiCo ₂ S ₄基复合材料在高性能储能器件中的实际应用。