Constructing high capacitance active materials and three-dimensional (3D) conductive networks inside textile yarn frames is a promising strategy to synthesize yarn supercapacitor electrodes. In this study, growing NiCo₂S₄@Ni–Co layered double hydroxide (LDH) nanotube arrays on Au-metalized cotton yarns yields a novel yarn supercapacitor electrode material. The resulting yarn electrode possesses numerous merits, including high electrical conductivity from NiCo₂S₄ and Au-metalized cotton yarns, high capacitance of Ni–Co LDH nanosheets, and the 3D hierarchical electrode structure. The unique electrode structure leads to excellent electrochemical properties including high capacitance (5680 mF cm^–2), excellent rate performance, and stable cycling performance. A two-ply symmetric yarn supercapacitor assembled from the NiCo₂S₄/Ni–Co LDH/Au/cotton yarn electrode reaches an areal energy density of 3.5 μW h cm^–2.

中文翻译：

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用于柔性超级电容器的金属棉纱上的分层NiCo ₂ S ₄ @镍–钴层状双氢氧化物纳米管阵列。

在纺织纱线框架内构造高电容活性材料和三维（3D）导电网络是合成纱线超级电容器电极的一种有前途的策略。在这项研究中，在金金属化的棉纱上生长NiCo ₂ S ₄ @ Ni-Co层状双氢氧化物（LDH）纳米管阵列可产生一种新型的纱超级电容器电极材料。所得的纱线电极具有许多优点，包括来自NiCo ₂ S ₄和金金属化的棉纱的高电导率，Ni-Co LDH纳米片的高电容以及3D分层电极结构。独特的电极结构带来出色的电化学性能，包括高电容（5680 mF cm ^–2），出色的速率性能和稳定的循环性能。由NiCo ₂ S ₄ / Ni-Co LDH / Au /棉纱线电极组装而成的两层对称纱线超级电容器的面能量密度为3.5μWh cm ^-2。