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  • MoS2/Celgard separator as efficient polysulfide barrier for long-life lithium–sulfur batteries

    Author(s)
    Ghazi, Zahid Ali
    He, Xiao
    Khattak, Abdul Muqsit
    Khan, Niaz Ali
    Liang, Bin
    Iqbal, Azhar
    Wang, Jinxin
    Sin, Haksong
    Li, Lianshan
    Tang, Zhiyong
    Griffith University Author(s)
    Tang, Zhiyong
    Year published
    2017
    Metadata
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    Abstract
    A high lithium conductive MoS2/Celgard composite separator is reported as efficient polysulfides barrier in Li–S batteries. Significantly, thanks to the high density of lithium ions on MoS2 surface, this composite separator shows high lithium conductivity, fast lithium diffusion, and facile lithium transference. When used in Li–S batteries, the separator is proven to be highly efficient for depressing polysulfides shuttle, leading to high and long cycle stability. With 65% of sulfur loading, the device with MoS2/Celgard separator delivers an initial capacity of 808 mAh g−1 and a substantial capacity of 401 mAh g−1 after 600 ...
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    A high lithium conductive MoS2/Celgard composite separator is reported as efficient polysulfides barrier in Li–S batteries. Significantly, thanks to the high density of lithium ions on MoS2 surface, this composite separator shows high lithium conductivity, fast lithium diffusion, and facile lithium transference. When used in Li–S batteries, the separator is proven to be highly efficient for depressing polysulfides shuttle, leading to high and long cycle stability. With 65% of sulfur loading, the device with MoS2/Celgard separator delivers an initial capacity of 808 mAh g−1 and a substantial capacity of 401 mAh g−1 after 600 cycles, corresponding to only 0.083% of capacity decay per cycle that is comparable to the best reported result so far. In addition, the Coulombic efficiency remains more than 99.5% during all 600 cycles, disclosing an efficient ionic sieve preventing polysulfides migration to the anode while having negligible influence on Li+ ions transfer across the separator. The strategy demonstrated in this work will open the door toward developing efficient separators with flexible 2D materials beyond graphene for energy-storage devices.
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    Journal Title
    Advanced Materials
    Volume
    29
    Issue
    21
    DOI
    https://doi.org/10.1002/adma.201606817
    Subject
    Physical sciences
    Chemical sciences
    Engineering
    Science & Technology
    Technology
    Chemistry, Multidisciplinary
    Chemistry, Physical
    Publication URI
    http://hdl.handle.net/10072/405798
    Collection
    • Journal articles

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