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Engineering the Van der Waals Interaction in Cross-Linking-Free Hydroxide Exchange Membranes for Low Swelling and High Conductivity

Authors

  • Dr. Shuang Gu,

    1. Department of Chemical and Environmental Engineering, University of California-Riverside, Riverside, CA 92521 (USA)
    2. Department of Chemical and Biomolecular Engineering, University of Delaware, Newark, DE 19716 (USA), Fax: (+1) 302-831-2582
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  • Jason Skovgard,

    1. Department of Chemical and Environmental Engineering, University of California-Riverside, Riverside, CA 92521 (USA)
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  • Prof. Dr. Yushan S. Yan

    Corresponding author
    1. Department of Chemical and Environmental Engineering, University of California-Riverside, Riverside, CA 92521 (USA)
    2. Department of Chemical and Biomolecular Engineering, University of Delaware, Newark, DE 19716 (USA), Fax: (+1) 302-831-2582
    • Department of Chemical and Environmental Engineering, University of California-Riverside, Riverside, CA 92521 (USA)
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Abstract

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What a swell for hydroxides: The typical trade-off between swelling control and ion conductivity in ion-conducting polymer membranes is overcome by enhancement of van der Waals interactions among polymer chains. Using a quaternary phosphonium-functionalized polymer, the simple combination of high electron density of the polymer and large dipole moment of the functional group leads to low membrane swelling, high hydroxide conductivity, and excellent hydroxide exchange membrane fuel cell performance.

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