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    Surface chemistry and morphology of the solid electrolyte interphase on silicon nanowire lithium-ion battery anodes

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    Type
    Article
    Authors
    Chan, Candace K.
    Ruffo, Riccardo
    Hong, Seung Sae
    Cui, Yi cc
    Date
    2009-04
    Permanent link to this record
    http://hdl.handle.net/10754/599807
    
    Metadata
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    Abstract
    Silicon nanowires (SiNWs) have the potential to perform as anodes for lithium-ion batteries with a much higher energy density than graphite. However, there has been little work in understanding the surface chemistry of the solid electrolyte interphase (SEI) formed on silicon due to the reduction of the electrolyte. Given that a good, passivating SEI layer plays such a crucial role in graphite anodes, we have characterized the surface composition and morphology of the SEI formed on the SiNWs using X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM). We have found that the SEI is composed of reduction products similar to that found on graphite electrodes, with Li2CO3 as an important component. Combined with electrochemical impedance spectroscopy, the results were used to determine the optimal cycling parameters for good cycling. The role of the native SiO2 as well as the effect of the surface area of the SiNWs on reactivity with the electrolyte were also addressed. © 2009 Elsevier B.V. All rights reserved.
    Citation
    Chan CK, Ruffo R, Hong SS, Cui Y (2009) Surface chemistry and morphology of the solid electrolyte interphase on silicon nanowire lithium-ion battery anodes. Journal of Power Sources 189: 1132–1140. Available: http://dx.doi.org/10.1016/j.jpowsour.2009.01.007.
    Sponsors
    The work is supported by the Global Climate and Energy Project at Stanford, Office of Naval Research, and King Abdullah University of Science and Technology. C.K.C. acknowledges support from a National Science Foundation graduate fellowship and Stanford Graduate Fellowship.
    Publisher
    Elsevier BV
    Journal
    Journal of Power Sources
    DOI
    10.1016/j.jpowsour.2009.01.007
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.jpowsour.2009.01.007
    Scopus Count
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