期刊
ACS APPLIED MATERIALS & INTERFACES
卷 4, 期 5, 页码 2672-2679出版社
AMER CHEMICAL SOC
DOI: 10.1021/am300333s
关键词
lithium-ion batteries; anodes; nanofibers; carbon; alpha-Fe2O3
资金
- U.S. Department of Energy [DE-EE0001177]
- ERC of the National Science Foundation [EEC-08212121]
- Advanced Transportation Energy Center at North Carolina State University
alpha-Fe2O3 nanoparticle-loaded carbon nanofiber composites were fabricated via electrospinning FeCl3.6H(2)O salt-polyacrylonitrile precursors in N,N-dimethylformamide solvent and the subsequent carbonization in inert gas. Scanning electron microscopy, transmission electron microscopy, energy dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy, X-ray diffraction, and elemental analysis were used to study the morphology and composition of alpha-Fe2O3-carbon nanofiber composites. It was indicated that alpha-Fe2O3 nanoparticles with an average size of about 20 nm have a homogeneous dispersion along the carbon nanofiber surface. The resultant alpha-Fe2O3-carbon nanofiber composites were used directly as the anode material in rechargeable lithium half cells, and their electrochemical performance was evaluated. The results indicated that these alpha-Fe2O3-carbon nanofiber composites have high reversible capacity, good capacity retention, and acceptable rate capability when used as anode materials for rechargeable lithium-ion batteries.
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