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    MXene based self-assembled cathode and antifouling separator for high-rate and dendrite-inhibited Li–S battery

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    Manuscript-Dong Guo.pdf
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    Type
    Article
    Authors
    Guo, Dong
    Ming, Fangwang cc
    Su, Hang
    Wu, Yingqiang
    Wahyudi, Wandi
    Li, Mengliu cc
    Hedhili, Mohamed N. cc
    Sheng, Guan cc
    Li, Lain-Jong cc
    Alshareef, Husam N. cc
    Li, Yangxing
    Lai, Zhiping cc
    KAUST Department
    Advanced Membranes and Porous Materials Research Center
    Chemical Engineering Program
    Functional Nanomaterials and Devices Research Group
    Material Science and Engineering Program
    Physical Science and Engineering (PSE) Division
    Surface Science
    Date
    2019-05-09
    Online Publication Date
    2019-05-09
    Print Publication Date
    2019-07
    Permanent link to this record
    http://hdl.handle.net/10754/652901
    
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    Abstract
    We demonstrate a novel strategy to enhance sulfur loading and rate performance for Li–S battery by synchronously coupling a nanostructured cathode with an antifouling separator via a facile electrostatic self-assembly approach. The assembly of two dimensional (2D) MXene and positively charged 1D CNT-Polyethyleneimine was observed to controllably address the key issues of sluggish ionic transport, and produce an integrate cathode with dynamic crosslinking network. Moreover, an antifouling separator is proposed by this strategy for the first time, which features well-organized inter-lamellar porosity, dual polarity and high conductivity. The antifouling separator is found to play a pivotal role in: 1) low-order polysulfide activation, 2) high rate cyclability, and 3) Li dendrites inhibition. Our integrated design realizes a long-term capacity of 980 mAh g−1 at 5 mA cm−2 over 500 cycles (sulfur loading: 2.6 mg cm−2). Furthermore, a flexible self-assembled cathode with high loading (5.8 mg cm−2) and superb mechanical strength (13 MPa), demonstrates an appealing areal capacity of 7.1 mAh cm−2 and rate performance at nearly 10 mA cm−2.
    Citation
    Guo D, Ming F, Su H, Wu Y, Wahyudi W, et al. (2019) MXene based self-assembled cathode and antifouling separator for high-rate and dendrite-inhibited Li–S battery. Nano Energy 61: 478–485. Available: http://dx.doi.org/10.1016/j.nanoen.2019.05.011.
    Sponsors
    This work was supported by Huawei Grant RGC/3/3513.
    Publisher
    Elsevier BV
    Journal
    Nano Energy
    DOI
    10.1016/j.nanoen.2019.05.011
    Additional Links
    https://www.sciencedirect.com/science/article/pii/S2211285519304173
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.nanoen.2019.05.011
    Scopus Count
    Collections
    Articles; Advanced Membranes and Porous Materials Research Center; Physical Science and Engineering (PSE) Division; Chemical Engineering Program; Material Science and Engineering Program

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