Hierarchical three-dimensional flower-like Co3O4 architectures with a mesocrystal structure as high capacity anode materials for long-lived lithium-ion batteries
Hierarchical three-dimensional flower-like Co3O4 architectures with a mesocrystal structure as high capacity anode materials for long-lived lithium-ion batteries
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具有介晶结构的分层三维花状Co3O4结构作为长寿命锂离子电池的高容量负极材料
DOI：
10.1007/s12274-017-1759-0
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发表时间：
2018-03-01
期刊：
影响因子：
9.9
通讯作者：
Zhu, Min
中科院分区：
文献类型：
--
作者：
Cao, Wenqiang;Wang, Wenzhong;Zhu, Min
在这项工作中，我们合理地设计了一种基于三维（3D）分层Co3O4花状结构的高容量电极，具有中晶纳米结构。微尺寸的三维分层结构与具有高孔隙率和单晶性质的介晶结构的特定组合可以解决锂离子电池转换电极中存在的容量衰退和循环稳定性问题。层次化的三维花状Co3O4结构适应了锂化-衰减过程中的体积变化并减轻了机械应力，而介晶结构提供了额外的锂离子存储和电子/离子传输路径。在1.12℃（1℃= 890 mA·h·g−1）下循环800次后，所获得的具有中晶纳米结构的层次化三维Co3O4花状结构具有920 mA·h·g−1的高可逆容量，提高了速率性能和循环稳定性。这项工作的发现为设计先进和长寿命的锂离子电池提供了新的视角。
In this work, we rationally design a high-capacity electrode based on three-dimensional (3D) hierarchical Co3O4 flower-like architectures with a mesocrystal nanostructure. The specific combination of the micro-sized 3D hierarchical architecture and the mesocrystal structure with a high porosity and single crystal-like nature can address the capacity fading and cycling stability as presented in many conversion electrodes for lithium-ion batteries. The hierarchical 3D flower-like Co3O4 architecture accommodates the volume change and mitigates mechanical stress during the lithiation–delithiation processes, and the mesocrystal structure provides extra lithium-ion storage and electron/ion transport paths. The achieved hierarchical 3D Co3O4 flower-like architectures with a mesocrystal nanostructure exhibit a high reversible capacity of 920 mA·h·g−1 after 800 cycles at 1.12 C (1 C = 890 mA·h·g−1), improved rate performance, and cycling stability. The finding in this work offers a new perspective for designing advanced and long-lived lithium-ion batteries.