期刊
MATERIALS RESEARCH BULLETIN
卷 48, 期 11, 页码 4791-4796出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.materresbull.2013.08.046
关键词
Composites; Chemical synthesis; Electrochemical measurements; Electrochemical properties
资金
- National Natural Science Foundation of China [51102134]
- Nanjing University of Science and Technology through NUST Research Funding [AB41385]
- Jiangsu Planned Projects for Postdoctoral Research Funds [1202001B]
- China Postdoctoral Science Foundation [2013M530258]
The carbon-coated Fe3O4 nanoflakes were synthesized by partial reduction of monodispersed hematite (Fe2O3) nanoflakes with carbon coating. The carbon-coated Fe3O4 nanoflakes were characterized by X-ray diffraction, Raman spectroscopy, field emission scanning electron microscopy, transmission electron microscopy, and galvanostatic charge/discharge measurements. It has been demonstrated that Fe2O3 can be completely converted to Fe3O4 during the reduction process and carbon can be successfully coated on the surface of Fe3O4 nanoflakes, forming a conductive matrix. As anode material for lithium-ion batteries, the carbon-coated Fe3O4 nanoflakes exhibit a large reversible capacity up to 740 mAh g(-1) with significantly improved cycling stability and rate capability compared to the bare Fe2O3 nanoflakes. The superior electrochemical performance of the carbon-coated Fe3O4 nanoflakes can be attributed to the synthetic effects between small particle size and highly conductive carbon matrix. (C) 2013 Elsevier Ltd. All rights. reserved.
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