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    Atomic Layer Deposition of SnO2 on MXene for Li-Ion Battery Anodes

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    Type
    Article
    Authors
    Ahmed, Bilal cc
    Anjum, Dalaver H. cc
    Gogotsi, Yury cc
    Alshareef, Husam N. cc
    KAUST Department
    Electron Microscopy
    Functional Nanomaterials and Devices Research Group
    Material Science and Engineering Program
    Physical Science and Engineering (PSE) Division
    Date
    2017-02-24
    Online Publication Date
    2017-02-24
    Print Publication Date
    2017-04
    Permanent link to this record
    http://hdl.handle.net/10754/622938
    
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    Abstract
    In this report, we show that oxide battery anodes can be grown on two-dimensional titanium carbide sheets (MXenes) by atomic layer deposition. Using this approach, we have fabricated a composite SnO2/MXene anode for Li-ion battery applications. The SnO2/MXene anode exploits the high Li-ion capacity offered by SnO2, while maintaining the structural and mechanical integrity by the conductive MXene platform. The atomic layer deposition (ALD) conditions used to deposit SnO2 on MXene terminated with oxygen, fluorine, and hydroxyl-groups were found to be critical for preventing MXene degradation during ALD. We demonstrate that SnO2/MXene electrodes exhibit excellent electrochemical performance as Li-ion battery anodes, where conductive MXene sheets act to buffer the volume changes associated with lithiation and delithiation of SnO2. The cyclic performance of the anodes is further improved by depositing a very thin passivation layer of HfO2, in the same ALD reactor, on the SnO2/MXene anode. This is shown by high-resolution transmission electron microscopy to also improve the structural integrity of SnO2 anode during cycling. The HfO2 coated SnO2/MXene electrodes demonstrate a stable specific capacity of 843 mAh/g when used as Li-ion battery anodes.
    Citation
    Ahmed B, Anjum DH, Gogotsi Y, Alshareef HN (2017) Atomic Layer Deposition of SnO2 on MXene for Li-Ion Battery Anodes. Nano Energy. Available: http://dx.doi.org/10.1016/j.nanoen.2017.02.043.
    Sponsors
    Research reported in this publication is supported by funding from King Abdullah University of Science and Technology (KAUST). The authors thank Mrinal Hota and Narendra Kurra for their support, and Heno Hwang for the design of schematic illustrations.
    Publisher
    Elsevier BV
    Journal
    Nano Energy
    DOI
    10.1016/j.nanoen.2017.02.043
    Additional Links
    http://www.sciencedirect.com/science/article/pii/S2211285517301210
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.nanoen.2017.02.043
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Material Science and Engineering Program

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