A low consumption and facile method was employed to prepare hollow nickel–cobalt-layered double hydroxide (NiCo-LDH) nanoflakes grown in situ on nickel foam in deionized water at room temperature. By using MOFs (Metal–organic frameworks) as the precursor and then adjusting the Ni²⁺ ion exchange reaction time, the surface morphology and electrochemical performance of NiCo-LDH electrode materials can be greatly optimized. NiCo-LDH nanoflakes with a thickness of 150 nm as electrode material have a high specific capacity of 2148 F/g at the current density of 1 A/g and possess cycling stability of 82% capacity retention after 1000 cycles. This study provides a prominent approach for fabricating hollow nanomaterials with three-dimensional structures, and its excellent electrochemical performances make it a promising candidate for low energy consumption and high-performance energy storage devices.

中文翻译：

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源自MOF的中空NiCo-LDH纳米薄片的低功耗设计，用于大容量电极材料

一种低消耗且简便的方法用于制备在室温下在去离子水中的镍泡沫上原位生长的中空镍钴层双氢氧化物（NiCo-LDH）纳米薄片。通过使用MOF（金属有机框架）作为前体，然后调节Ni ²⁺NiCo-LDH电极材料的离子交换反应时间，表面形貌和电化学性能可以大大优化。作为电极材料的厚度为150 nm的NiCo-LDH纳米片在1 A / g的电流密度下具有2148 F / g的高比电容，在1000次循环后具有82％的容量保持率的循环稳定性。这项研究为制造具有三维结构的中空纳米材料提供了一种突出的方法，其出色的电化学性能使其成为低能耗和高性能储能装置的有希望的候选者。