Abstract Layered double hydroxides (LDHs) are under the current research focus because of their uniqueness in low cost, highly tunable composition and properties. However, rational design the nanostructure of LDH is highly desirable to optimize their performance. Herein, a novel binder-free organic domestic wastes-derived carbons (OCS) decorated NiCo-LDH nanocages was designed and fabricated using a ZIF-67-derived strategy on Ni foam, and the resultant integrated OCS/NiCo-LDH@Ni foam electrode could directly acted as promising electrode for supercapacitor. The integrated electrode could deliver a high specific capacitance of 1784 F g−1 at a current density of 1 A g−1, and 732 F g−1 at 10 A g−1. The maximum specific capacitance 611.46 F g−1 was delivered at 3 A g−1 by the assembled symmetric supercapacitor. 83.2% capacitance retention and about 100% coulombic efficiency were retained after 6000 GCD cycles at current density of 8 A g−1. OCS/NiCo-LDH@Ni foam electrode was also demonstrated to possess high energy density of 108.7 W h Kg−1 at 2400 W Kg−1. This work opens a promising avenue for the new and rational design of high performance supercapacitor and the recycling utilization of solid waste.

中文翻译：

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ZIF-67 衍生的空心 OCS/NiCo-LDH 纳米笼作为高性能超级电容器的无粘合剂电极

摘要 层状双氢氧化物（LDHs）因其成本低、组成和性质高度可调的独特性而成为当前的研究热点。然而，非常需要合理设计 LDH 的纳米结构以优化其性能。在此，使用 ZIF-67 衍生策略在 Ni 泡沫上设计和制造了一种新型的无粘合剂有机生活垃圾衍生碳 (OCS) 装饰的 NiCo-LDH 纳米笼，以及由此产生的集成 OCS/NiCo-LDH@Ni 泡沫电极可以直接作为超级电容器的电极。集成电极可以在 1 A g-1 的电流密度下提供 1784 F g-1 的高比电容，在 10 A g-1 时提供 732 F g-1 的高比电容。最大比电容 611.46 F g-1 由组装的对称超级电容器以 3 A g-1 提供。83. 在 8 A g-1 的电流密度下进行 6000 次 GCD 循环后，2% 的电容保持率和约 100% 的库仑效率得以保持。OCS/NiCo-LDH@Ni 泡沫电极也被证明在 2400 W Kg-1 时具有 108.7 W h Kg-1 的高能量密度。这项工作为高性能超级电容器的新型合理设计和固体废物的回收利用开辟了一条有前途的途径。