Abstract : Rational construction of electrode materials with exclusive structures and compositions are highly attractive for improving the electrochemical properties of supercapacitors (SCs). In the present study, we demonstrate the construction of unique core–shell Ni−Mn−Co−S@Co(OH)₂ nanoarrays on nickel foam (denoted as NMCS@COH/NF) as an attractive battery‐type electrode material for SCs through the hydrothermal and electrodeposition strategies, in which the Ni−Mn−Co−S nanowires are well wrapped in the Co(OH)₂ shells. Benefiting from the attractive structural properties, the NMCS@COH/NF electrode exhibits considerable electrochemical properties in the aspects of reasonable rate performance (80.3 % up to 24 A g⁻¹), long‐term cyclability (retention rate of 93.3 % undergoing 10 000 cycles), and exceptional capacity (284.85 mAh g⁻¹ at 2 A g⁻¹). Subsequently, the NMCS@COH electrode is assembled into a hybrid supercapacitor, which delivers a good energy density of 51.1 Wh kg⁻¹ at 751.47 W kg⁻¹ and a maximum power density of 18411.76 W kg⁻¹ at 31.3 Wh kg⁻¹. This work provides a straightforward route to rational construction of the electrode materials with promising structural and electrochemical properties for SC applications.

中文翻译：

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面向高性能混合超级电容器的核壳Ni-Mn-Co-S @ Co（OH）2纳米阵列的合理构建

摘要：具有专有结构和成分的电极材料的合理构造对于改善超级电容器（SCs）的电化学性能非常有吸引力。在本研究中，我们证明了在泡沫镍（表示为NMCS @ COH / NF）上独特的核壳Ni-Mn-Co-S @ Co（OH）₂纳米阵列的构建，作为SC的有吸引力的电池型电极材料通过水热和电沉积策略，其中Ni-Mn-Co-S纳米线很好地包裹在Co（OH）₂壳中。NMCS @ COH / NF电极得益于引人注目的结构性能，在合理的速率性能方面表现出了可观的电化学性能（在24 A g ^-1以下为80.3％），长期循环性能（93.3％经历10个周期保持率）和优异的容量（284.85毫安克^-1以2A克^-1）。随后，NMCS @ COH电极组装成一个混合超级电容器，可提供51.1瓦公斤的良好的能量密度^-1在751.47W¯¯千克^-1和18411.76的最大功率密度钨千克^-1在31.3瓦千克^-1。这项工作为合理构造电极材料提供了一条简单的途径，具有用于SC应用的有希望的结构和电化学性能。