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    Interconnected Silicon Hollow Nanospheres for Lithium-Ion Battery Anodes with Long Cycle Life

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    Type
    Article
    Authors
    Yao, Yan
    McDowell, Matthew T.
    Ryu, Ill
    Wu, Hui
    Liu, Nian
    Hu, Liangbing
    Nix, William D.
    Cui, Yi cc
    KAUST Grant Number
    KUS-l1-001-12
    Date
    2011-07-13
    Permanent link to this record
    http://hdl.handle.net/10754/598649
    
    Metadata
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    Abstract
    Silicon is a promising candidate for the anode material in lithium-ion batteries due to its high theoretical specific capacity. However, volume changes during cycling cause pulverization and capacity fade, and improving cycle life is a major research challenge. Here, we report a novel interconnected Si hollow nanosphere electrode that is capable of accommodating large volume changes without pulverization during cycling. We achieved the high initial discharge capacity of 2725 mAh g-1 with less than 8% capacity degradation every hundred cycles for 700 total cycles. Si hollow sphere electrodes also show a Coulombic efficiency of 99.5% in later cycles. Superior rate capability is demonstrated and attributed to fast lithium diffusion in the interconnected Si hollow structure. © 2011 American Chemical Society.
    Citation
    Yao Y, McDowell MT, Ryu I, Wu H, Liu N, et al. (2011) Interconnected Silicon Hollow Nanospheres for Lithium-Ion Battery Anodes with Long Cycle Life. Nano Lett 11: 2949–2954. Available: http://dx.doi.org/10.1021/nl201470j.
    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. This work is also partially 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. Y.C. acknowledges support from the King Abdullah University of Science and Technology (KAUST) Investigator Award (No. KUS-l1-001-12). W.D.N and I.R. were supported by the Office of Science, Office of Basic Energy Sciences, of the US Department of Energy under Contract No. DE-FG02-04ER46163. M.T.M. gratefully acknowledges support from the Chevron Stanford Graduate Fellowship, the National Defense Science and Engineering Graduate Fellowship, and the National Science Foundation Graduate Fellowship.
    Publisher
    American Chemical Society (ACS)
    Journal
    Nano Letters
    DOI
    10.1021/nl201470j
    PubMed ID
    21668030
    ae974a485f413a2113503eed53cd6c53
    10.1021/nl201470j
    Scopus Count
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