期刊
NANOSCALE
卷 5, 期 21, 页码 10623-10628出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3nr03955b
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资金
- National Natural Science Foundation of China [21103108, 21173148]
- SJTU-UM collaborative research project
Si has the second highest theoretical capacity among all the known anode materials for lithium ion batteries, whereas it is vulnerable to pulverization and crumbling upon lithiation/delithiation. Herein, Si mesoporous nanowires prepared by a scalable and cost-effective procedure are reported for the first time. Such nanowire morphology and mesoporous structure can effectively buffer the huge lithiationin-induced volume expansion of Si, therefore contributing to excellent cycling stability and high-rate capability. Reversible capacities of 1826.8 and 737.4 mA h g(-1) can be obtained at 500 mA g(-1) and a very high current density of 10 A g(-1), respectively. After 1000 cycles at 2500 mA g(-1), this product still maintains a high capacity of 643.5 mA h g(-1).
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