期刊
SCIENTIFIC REPORTS
卷 5, 期 -, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/srep17553
关键词
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资金
- Chinese 973 Project [2010CB933901]
- National Natural Science Foundation of China [81225010, 21422604]
- 863 High-Tech project of China [2014AA020701]
An effective one-pot hydrothermal method for in situ filling of multi-wall carbon nanotubes (CNT, diameter of 20-40 nm, length of 30-100 mu m) with ultrafine ferroferric oxide (Fe3O4) nanoparticles (8-10 nm) has been demonstrated. The synthesized Fe3O4@CNT exhibited a mesoporous texture with a specific surface area of 109.4 m(2) g(-1). The loading of CNT, in terms of the weight ratio of Fe3O4 nanoparticles, can reach as high as 66.5 wt%. Compared to the conventional method of using a Al2O3 membrane as template to fill CNT with iron oxides nanoparticles, our strategy is facile, effective, low cost and easy to scale up to large scale production (similar to 1.42 g per one-pot). When evaluated for lithium storage at 1.0 C (1 C = 928 mA g(-1)), the mesoporous Fe3O4@CNT can retain at 358.9 mAh g(-1) after 60 cycles. Even when cycled at high rate of 20 C, high capacity of 275.2 mAh g(-1) could still be achieved. At high rate (10 C) and long life cycling (500 cycles), the cells still exhibit a good capacity of 137.5 mAhg(-1).
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