期刊
NANO RESEARCH
卷 11, 期 3, 页码 1437-1446出版社
TSINGHUA UNIV PRESS
DOI: 10.1007/s12274-017-1759-0
关键词
Co3O4; three-dimensional; anode materials; lithium-ion batteries
类别
资金
- National Natural Science Foundation of China [11374377, 61575225, 11404414, 11074312, 11474174]
- Undergraduate Research Training Program of Minzu University of China [GCCX2016110009, GCCX2016110010]
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.
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