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    Improving the cycling stability of silicon nanowire anodes with conducting polymer coatings

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    Type
    Article
    Authors
    Yao, Yan
    Liu, Nian
    McDowell, Matthew T.
    Pasta, Mauro
    Cui, Yi cc
    KAUST Grant Number
    KUS-ll-001-12
    Date
    2012
    Permanent link to this record
    http://hdl.handle.net/10754/598585
    
    Metadata
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    Abstract
    For silicon nanowires (Si NWs) to be used as a successful high capacity lithium-ion battery anode material, improvements in cycling stability are required. Here we show that a conductive polymer surface coating on the Si NWs improves cycling stability; coating with PEDOT causes the capacity retention after 100 charge-discharge cycles to increase from 30% to 80% over bare NWs. The improvement in cycling stability is attributed to the conductive coating maintaining the mechanical integrity of the cycled Si material, along with preserving electrical connections between NWs that would otherwise have become electrically isolated during volume changes. © 2012 The Royal Society of Chemistry.
    Citation
    Yao Y, Liu N, McDowell MT, Pasta M, Cui Y (2012) Improving the cycling stability of silicon nanowire anodes with conducting polymer coatings. Energy Environ Sci 5: 7927. Available: http://dx.doi.org/10.1039/c2ee21437g.
    Sponsors
    This work was partially supported by the Assistant Secretary for Energy Efficiency and Renewable Energy, Office of Vehicle Technologies of the U.S. Department of Energy under contract no. DE-AC02-05CH11231, subcontract no. 6951379 under the Batteries for Advanced Transportation Technologies (BATT) Program. Y.C. acknowledges support from the King Abdullah University of Science and Technology (KAUST) Investigator Award (no. KUS-ll-001-12). A portion of this work is also supported by the Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering, under contract DE-AC02-76SF0051, through the SLAC National Accelerator Laboratory LDRD project. M. T. M. acknowledges support from the Chevron Stanford Graduate Fellowship, the National Defense Science and Engineering Graduate Fellowship, and the National Science Foundation Graduate Fellowship.
    Publisher
    Royal Society of Chemistry (RSC)
    Journal
    Energy & Environmental Science
    DOI
    10.1039/c2ee21437g
    ae974a485f413a2113503eed53cd6c53
    10.1039/c2ee21437g
    Scopus Count
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    Publications Acknowledging KAUST Support

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