Recently, MOF‐derived (metal‐organic framework) 2D materials, due to the special structure of the MOF inherited, have become a potential candidate for application in energy storage and conversion. In this work, a new 2D layered Co−MOF was synthesized as the precursor for fabricating Napoleon‐like Co₃O₄ (NL−Co₃O₄). The monolayer thickness of NL−Co₃O₄ is approximately 70 nm. The unique structure of layered porous of NL−Co₃O₄ derived from Co−MOF plays an important role in improving electrochemical and electro‐catalysis properties. As lithium ion battery anode material, NL−Co₃O₄ shows out‐bound cycling performance and rate capacity, which has an unprecedented high reversible capacity of 1120.5 mA h g⁻¹ at 200 mA g⁻¹ after 300 cycles and high rate capacities of 579.4 mA h g⁻¹ under the current density of 6.4 A g⁻¹. NL−Co₃O₄ still exhibits capacity of 679 and 576 mA h g⁻¹ after 200 cycles at high current densities of 1 and 4 A g⁻¹, respectively. Moreover, NL−Co₃O₄ has efficient oxygen evolution reduction (OER) catalytic performance (overpotential, ca. 420 mV), comparable with commercial RuO₂. During the process of continuous catalysis of OER, NL−Co₃O₄ shows good durability for about 15 h.

中文翻译：

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用于氧析出反应和高性能锂离子电池的二维金属有机框架衍生的Co3O4

最近，由于继承了MOF的特殊结构，MOF派生的（金属有机框架）二维材料已成为在能量存储和转换中应用的潜在候选者。在这项工作中，合成了一种新的二维层状Co-MOF，作为制造拿破仑状Co ₃ O ₄（NL-Co ₃ O ₄）的前体。NL-Co ₃ O ₄的单层厚度约为70 nm。Co-MOF衍生的NL-Co ₃ O ₄层状多孔体的独特结构在改善电化学和电催化性能方面起着重要作用。NL-Co ₃ O ₄作为锂离子电池负极材料显示出循环性能和倍率容量，在300次循环后，在200 mA g ^-1下具有史无前例的高可逆容量1120.5 mA h g ^-1，在6.4 A g的电流密度下具有579.4 mA h g ^-1的高倍容量^-1。在高电流密度分别为1和4 A g ^-1的200个循环后，NL-Co ₃ O ₄仍显示出679和576 mA h g ^-1的容量。此外，NL-Co ₃ O ₄具有有效的氧气释放还原（OER）催化性能（过电势，约420 mV），可与商业RuO _2相比。在OER的连续催化过程中，NL-Co ₃ O ₄表现出约15小时的良好耐久性。