Journal
ELECTROCHIMICA ACTA
Volume 127, Issue -, Pages 252-258Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2014.01.158
Keywords
Magnesiothermic reduction; Mesoporous silicon nanorods; Anode materials; Lithium ion batteries
Categories
Funding
- 973 Project of China [2011CB935901]
- National Nature Science Foundations of China [91022033, 21203111, 21071055, 51172076]
- New Century Excellent Talents in University [NCET-10-0369]
- Shandong Provincial Natural Science Foundation for Distinguished Young Scholar [JQ201205]
- Independent Innovation Foundations of Shandong University [2012ZD007]
- new-faculty start-up funding in Shandong University
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Mesoporous silicon nanorods assembled by small nanocrystals were successfully prepared using multiwalled carbon nanotubes (MWCNTs) as a template via a facile magnesiothermic reduction process. The obtained product was characterized by X-ray diffraction, Raman spectroscopy, transmission electron microscopy, nitrogen adsorption-desorption measurement and electrochemical measurements. The resulting mesoporous silicon nanorods as an anode exhibit a significantly improved electrochemical performance compared with the porous silicon networks and bulk silicon. The reversible capacity can retain 1038 mAh g(-1) at 200 mA g(-1) after 170 cycles. Even at a high rate of 2000 mA g-1, a reversible capacity of 664 mAh g(-1) can still be obtained. All these results suggest that the mesoporous silicon nanorods are a promising candidate for the next generation of lithium ion batteries. (C) 2014 Elsevier Ltd. All rights reserved.
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