期刊
JOURNAL OF MATERIALS CHEMISTRY
卷 22, 期 27, 页码 13826-13831出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2jm31159c
关键词
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资金
- Natural Science Foundation of China [51002057, 50825203]
- 863 program [2009AA03Z225]
- Natural Science Foundation of Hubei Province [2008CDA026]
- PCSIRT (Program for Changjiang Scholars and Innovative Research Team in University)
- Fundamental Research Funds for the Central Universities [HUST: 2010QN007]
Even after a decade of intensive efforts, achieving conversion-type anode materials with superior stability via a simple process still remains a great challenge. This work describes a facile solution process at room temperature combined with subsequent annealing to prepare unprecedented self-assembled mesoporous CoO nanodisks on a large scale. The hierarchically nanostructured CoO assemblies consist of orderly self-stacked mesoporous nanodisks of less than 10 nm in thickness and 3-5 mu m in diameter. Each CoO nanodisk is built up by extremely fine primary nanoparticles (similar to 5 nm). When evaluated as an anode material for lithium-ion batteries, the synergistic effects of the unique nanoarchitectures endow the self-assembled CoO nanodisks with superior electrochemical performances, including a high reversible lithium storage capacity (1118.6 mA h g(-1) after 50 discharge-charge cycles at 200 mA g(-1)) and excellent cycling performance (633.5 mA h g(-1) after 400 discharge-charge cycles at 800 mA g(-1)).
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