期刊
JOURNAL OF POWER SOURCES
卷 259, 期 -, 页码 92-97出版社
ELSEVIER
DOI: 10.1016/j.jpowsour.2014.02.081
关键词
Sol-gel; Carbon coating; Magnetite; Xerogel; Anode; Lithium-ion batteries
资金
- National Basic Research Program of China [2013CB934003]
- National Nature Science Foundation of China [21273019]
- Fundamental Research Funds for the Central Universities [FRF-MP-12-006B]
Carbon coated Fe3O4 nanocomposite (Fe3O4/C) is synthesized via a simple sol gel route and a subsequent carbon CVD process, with Fe2O3 xerogel as intermediate product. The nanoporous Fe3O3 xerogel is reduced to Fe3O4 during the CVD process. The prepared Fe3O4/C composite presents a well-distributed nanostructure composing of Fe3O4 nanoparticles coated with carbon layer. The electrode exhibits a stable reversible capacity of over 850 mAh g(-1) at 0.1 A g(-1), excellent cycling performance and good rate capability. Both of the nano-scale particle size of Fe3O4 and the carbon layer contribute to the excellent electrochemical performance of Fe3O4/C. An increase in electrode capacity with cycling is observed for the prepared Fe3O4/C composite when cycled at 50 degrees C, which is similar to other reported transition metal oxides. The preparation process of Fe3O4/C composite is facile, mild and productive. (C) 2014 Elsevier B.V. All rights reserved.
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