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    Carbon−Silicon Core−Shell Nanowires as High Capacity Electrode for Lithium Ion Batteries

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    Type
    Article
    Authors
    Cui, Li-Feng
    Yang, Yuan
    Hsu, Ching-Mei
    Cui, Yi cc
    KAUST Grant Number
    KUS-11001-12
    Date
    2009-09-09
    Permanent link to this record
    http://hdl.handle.net/10754/597734
    
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    Abstract
    We introduce a novel design of carbon-silicon core-shell nanowires for high power and long life lithium battery electrodes. Amorphous silicon was coated onto carbon nanofibers to form a core-shell structure and the resulted core-shell nanowires showed great performance as anode material. Since carbon has a much smaller capacity compared to silicon, the carbon core experiences less structural stress or damage during lithium cycling and can function as a mechanical support and an efficient electron conducting pathway. These nanowires have a high charge storage capacity of ∼2000 mAh/g and good cycling life. They also have a high Coulmbic efficiency of 90% for the first cycle and 98-99.6% for the following cycles. A full cell composed of LiCoO2 cathode and carbon-silicon core-shell nanowire anode is also demonstrated. Significantly, using these core-shell nanowires we have obtained high mass loading and an area capacity of ∼4 mAh/cm2, which is comparable to commercial battery values. © 2009 American Chemical Society.
    Citation
    Cui L-F, Yang Y, Hsu C-M, Cui Y (2009) Carbon−Silicon Core−Shell Nanowires as High Capacity Electrode for Lithium Ion Batteries. Nano Lett 9: 3370–3374. Available: http://dx.doi.org/10.1021/nl901670t.
    Sponsors
    The work is partially supported by the Global Climate and Energy Project at Stanford, Office of Naval Research and King Abdullah University of Science and Technology (KAUST) under the Award No. KUS-11001-12.
    Publisher
    American Chemical Society (ACS)
    Journal
    Nano Letters
    DOI
    10.1021/nl901670t
    PubMed ID
    19655765
    ae974a485f413a2113503eed53cd6c53
    10.1021/nl901670t
    Scopus Count
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