Journal
JOURNAL OF PHYSICAL CHEMISTRY C
Volume 114, Issue 49, Pages 21158-21164Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jp1091009
Keywords
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Funding
- CCNU [CCNU09A01019]
- National Natural Science Foundation of China [50872039]
- China Postdoctoral Science Foundation [20090460996]
- Huazhong Normal University
- Ministry of Education, China [QLPL200902]
- National Innovation Experiment Program for University Students (CCNU) [091051111]
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Porous single-crystalline hematite (alpha-Fe2O3) nanorod array has been synthesized on large-area Ti foil via a facile hydrothermal method followed by a simple annealing treatment in Ar gas at 450 degrees C. The nanorods attained from 6 h hydrothermal reaction are average 30 nm in diameter and 450 nm in length. When used directly as additive-free anode for lithium ion batteries (LIBs), the alpha-Fe2O3 nanorod array demonstrates excellent cycling performance up to 50 times (similar to 562 mAh g(-1) retained at C/5) and good rate capability, in distinct contrast to alpha-Fe2O3 nanorod powder-based electrode. The improved electrochemical performance could be ascribed to the enhanced electron transport and Li+ diffusion that result from the well-defined array architecture and the porous nature of the single-crystalline nanorods. Fe3O4 and C/alpha-Fe2O3 nanorod arrays are further prepared to improve the lithium storage property. Our work represents a successful example of fabricating iron oxide 1D nanostructure arrays directly on nonreactive current collector. Once optimized, the array electrode may hold great promise in thin-film LIBs and other microelectronic systems.
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