Nickel‐cobalt layered double hydroxide (NiCo‐LDH) has attracted much attention because of its excellent electrochemical properties and regulability. And it is a potential pseudocapacitive electrode material, which is commonly used in supercapacitors and lithium‐ion batteries. Its application in the field of supercapacitors can improve the energy density, power density and cycle life of devices. However, NiCo‐LDH still faces some challenges, such as poor electrical conductivity and the capacity attenuation caused by agglomeration of layered structures, which require further research and optimization. In this paper, SnO2 films were prepared on carbon cloth (CC) by magnetron sputtering method, and Ni‐Co LDH nanosheets were grown by hydrothermal reaction to obtain NiCo‐LDH@SnO2 composites. Due to the synergistic effect between NiCo‐LDH and SnO2, NiCo‐LDH@SnO2 composites exhibit high Cs and good cyclic stability. In addition, an all‐solid‐state flexible asymmetric supercapacitor (ASC) was assembled with activated carbon (AC) anodes, showing good specific capacitance(Cs) and energy density. And a high initial capacitance can still be retained after 10,000 cycles. This paper shows that NiCo‐LDH@SnO2 shows excellent application potential in supercapacitors.

中文翻译：

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磁控溅射 SnO2 层与 NiCo-LDH 纳米片相结合，用于高性能全固态超级电容器

镍钴层状双氢氧化物（NiCo-LDH）因其优异的电化学性能和调节性而备受关注。它是一种潜在的赝电容电极材料，常用于超级电容器和锂离子电池。其在超级电容器领域的应用可以提高器件的能量密度、功率密度和循环寿命。然而，NiCo-LDH仍面临一些挑战，例如导电性差以及层状结构团聚导致的容量衰减等，需要进一步的研究和优化。本文采用磁控溅射法在碳布（CC）上制备SnO2薄膜，并通过水热反应生长Ni-Co LDH纳米片，得到NiCo-LDH@SnO2复合材料。由于NiCo-LDH和SnO2之间的协同作用，NiCo-LDH@SnO2复合材料表现出高Cs和良好的循环稳定性。此外，用活性炭（AC）阳极组装了全固态柔性非对称超级电容器（ASC），表现出良好的比电容（Cs）和能量密度。并且在10,000次循环后仍能保持较高的初始电容。本文表明NiCo-LDH@SnO2在超级电容器中表现出优异的应用潜力。