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  • Introducing ion-transport-regulating nanochannels to lithium-sulfur batteries

    Author(s)
    Pan, Yuede
    Zhou, Yahong
    Zhao, Qing
    Dou, Yuhai
    Chou, Shulei
    Cheng, Fangyi
    Chen, Jun
    Liu, Hua Kun
    Jiang, Lei
    Dou, Shi Xue
    Griffith University Author(s)
    Dou, Yuhai
    Year published
    2017
    Metadata
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    Abstract
    The ability of ion channels to facilitate the transport of some specific ions and meanwhile block other molecular or ionic species across the membranes of biological cells and intracellular organelles plays an important role in biological bodies for maintaining basic physiological activities. This feature is highly desirable in rechargeable lithium batteries because the electrochemical performances of some electrodes, such as sulfur cathodes, are greatly weakened by the dissolution of active material related anions into the electrolyte and the slow transport of lithium ions. Here, inspired by nature, a polymer membrane with ...
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    The ability of ion channels to facilitate the transport of some specific ions and meanwhile block other molecular or ionic species across the membranes of biological cells and intracellular organelles plays an important role in biological bodies for maintaining basic physiological activities. This feature is highly desirable in rechargeable lithium batteries because the electrochemical performances of some electrodes, such as sulfur cathodes, are greatly weakened by the dissolution of active material related anions into the electrolyte and the slow transport of lithium ions. Here, inspired by nature, a polymer membrane with negatively-charged nanochannels is applied to a sulfur-carbon cathode to overcome the poor cycling stability and rate capability of the lithium-sulfur battery. The polymer membrane possesses negatively charged nanochannels with a width dimension (ca. 2 nm) comparable to the Debye length, therefore is capable of regulating the ion transport by facilitating the transport of lithium ions and rejecting the migration of polysulfide anions. At 0.2 C and 1 C, the specific capacities keep at high levels of 1105 and 838 mA h g–1 after 100 cycles, respectively. Furthermore, at a high rate of 18 C, a high specific capacity of 612 mA h g–1 is retained over 250 cycles, with a high capacity retention of 91%.
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    Journal Title
    Nano Energy
    Volume
    33
    DOI
    https://doi.org/10.1016/j.nanoen.2017.01.025
    Subject
    Macromolecular and materials chemistry
    Materials engineering
    Nanotechnology
    Science & Technology
    Physical Sciences
    Technology
    Chemistry, Physical
    Nanoscience & Nanotechnology
    Publication URI
    http://hdl.handle.net/10072/408309
    Collection
    • Journal articles

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