Co3O4Hollow Nanoparticles Embedded in Mesoporous Walls of Carbon Nanoboxes for Efficient Lithium Storage
Co3O4Hollow Nanoparticles Embedded in Mesoporous Walls of Carbon Nanoboxes for Efficient Lithium Storage
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DOI：
10.1002/anie.202008987
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发表时间：
2020-08-31
影响因子：
16.6
通讯作者：
Lou, Xiong Wen (David)
中科院分区：
文献类型：
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作者：
Huang, Yi;Fang, Yongjin;Lou, Xiong Wen (David)
将纳米结构的电极材料包覆在多孔碳中是提高锂离子电池电化学性能的有效策略。在此，我们报道了由嵌入碳纳米盒（表示为H-Co 3 O 4 @ MCNB）的中孔壁中的高度分散的Co（3）O（4）中空纳米颗粒（小于20 nm）组成的混合中空纳米结构的设计和合成，作为锂离子电池的阳极材料。合成H-Co 3 O 4 @ MCNB的简单的金属有机骨架（MOF）接合策略包括化学蚀刻-配位和随后的两步退火处理。由于独特的结构优点，包括更多的活性界面位点、有效减轻的体积变化、良好且稳定的电接触以及Li（+）离子的容易进入，H-Co 3 O 4 @ MCNB在高比容量、优异的倍率性能和循环稳定性方面表现出优异的储锂性能。
Confining nanostructured electrode materials in porous carbon represents an effective strategy for improving the electrochemical performance of lithium-ion batteries. Herein, we report the design and synthesis of hybrid hollow nanostructures composed of highly dispersed Co(3)O(4)hollow nanoparticles (sub-20 nm) embedded in the mesoporous walls of carbon nanoboxes (denoted as H-Co3O4@MCNBs) as an anode material for lithium-ion batteries. The facile metal-organic framework (MOF)-engaged strategy for the synthesis of H-Co3O4@MCNBs involves chemical etching-coordination and subsequent two-step annealing treatments. Owing to the unique structural merits including more active interfacial sites, effectively alleviated volume variation, good and stable electrical contact, and easy access of Li(+)ions, the H-Co3O4@MCNBs exhibit excellent lithium-storage performance in terms of high specific capacity, excellent rate capability, and cycling stability.