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https://doi.org/10.1002/adfm.201100088
Title: | Epitaxial growth of branched α-Fe2O3/SnO 2 nano-heterostructures with improved lithium-ion battery performance | Authors: | Zhou, W. Cheng, C. Liu, J. Tay, Y.Y. Jiang, J. Jia, X. Zhang, J. Gong, H. Hng, H.H. Yu, T. Fan, H.J. |
Keywords: | α-Fe2O3 branching lithium-ion batteries nano-heterostructure SnO2 |
Issue Date: | 8-Jul-2011 | Citation: | Zhou, W., Cheng, C., Liu, J., Tay, Y.Y., Jiang, J., Jia, X., Zhang, J., Gong, H., Hng, H.H., Yu, T., Fan, H.J. (2011-07-08). Epitaxial growth of branched α-Fe2O3/SnO 2 nano-heterostructures with improved lithium-ion battery performance. Advanced Functional Materials 21 (13) : 2439-2445. ScholarBank@NUS Repository. https://doi.org/10.1002/adfm.201100088 | Abstract: | We report the synthesis of a novel branched nano-heterostructure composed of SnO2 nanowire stem and α-Fe2O3 nanorod branches by combining a vapour transport deposition and a facile hydrothermal method. The epitaxial relationship between the branch and stem is investigated by high resolution transmission electron microscopy (HRTEM). The SnO2 nanowire is determined to grow along the [101] direction, enclosed by four side surfaces. The results indicate that distinct crystallographic planes of SnO2 stem can induce different preferential growth directions of secondary nanorod branches, leading to six-fold symmetry rather than four-fold symmetry. Moreover, as a proof-of-concept demonstration of the function, such α-Fe2O3/SnO2 composite material is used as a lithium-ion batteries (LIBs) anode material. Low initial irreversible loss and high reversible capacity are demonstrated, in comparison to both single components. The synergetic effect exerted by SnO2 and α-Fe 2O3 as well as the unique branched structure are probably responsible for the enhanced performance. A unique six-fold-symmetry branched α-Fe2O3/SnO2 nano-heterostructure composed of SnO2 nanowire stems and α-Fe2O 3 nanorod branches are prepared by combining a vapour transport deposition and a facile hydrothermal method. As a lithium-ion battery material, the composite exhibits low initial irreversible loss and high reversible capacity in comparison to both single components. Copyright © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. | Source Title: | Advanced Functional Materials | URI: | http://scholarbank.nus.edu.sg/handle/10635/86310 | ISSN: | 1616301X | DOI: | 10.1002/adfm.201100088 |
Appears in Collections: | Staff Publications |
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