Hierarchical three-dimensional flower-like Co3O4 archi- tectures with a mesocrystal structure as high capacity anode materials for long-lived lithium-ion batteries

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...

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Veröffentlicht in:纳米研究:英文版 2018, Vol.11 (3), p.1437-1446
Hauptverfasser: Wenqiang Cao, Wenzhong Wang, Honglong Shi, Jun Wang, Maosheng Cao, Yujie Liang, Min Zhu
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Sprache:eng
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Zusammenfassung: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.gq), improved rate performance, and cycling stability. The finding in this work offers a new perspective for designing advanced and long-lived lithium-ion batteries.
ISSN:1998-0124
1998-0000