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In situ synthesis of Nanocomposite Membranes: Comprehensive Improvement Strategy for Direct Methanol Fuel Cells

Authors

  • Dr. Siyuan Rao,

    1. Beijing Key Laboratory of Bio-Inspired Energy Materials and Devices, School of Chemistry and Environment, Beihang University, 100191, Beijing (PR China)
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    • These authors contributed equally to this work.

  • Dr. Ruijie Xiu,

    1. Beijing Key Laboratory of Bio-Inspired Energy Materials and Devices, School of Chemistry and Environment, Beihang University, 100191, Beijing (PR China)
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    • These authors contributed equally to this work.

  • Dr. Jiangju Si,

    1. Beijing Key Laboratory of Bio-Inspired Energy Materials and Devices, School of Chemistry and Environment, Beihang University, 100191, Beijing (PR China)
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  • Prof. Shanfu Lu,

    Corresponding author
    1. Beijing Key Laboratory of Bio-Inspired Energy Materials and Devices, School of Chemistry and Environment, Beihang University, 100191, Beijing (PR China)
    2. Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry and Environment, Beihang University, 100191, Beijing (PR China)
    • Beijing Key Laboratory of Bio-Inspired Energy Materials and Devices, School of Chemistry and Environment, Beihang University, 100191, Beijing (PR China)

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  • Dr. Meng Yang,

    1. Beijing Key Laboratory of Bio-Inspired Energy Materials and Devices, School of Chemistry and Environment, Beihang University, 100191, Beijing (PR China)
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  • Prof. Yan Xiang

    Corresponding author
    1. Beijing Key Laboratory of Bio-Inspired Energy Materials and Devices, School of Chemistry and Environment, Beihang University, 100191, Beijing (PR China)
    2. Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry and Environment, Beihang University, 100191, Beijing (PR China)
    • Beijing Key Laboratory of Bio-Inspired Energy Materials and Devices, School of Chemistry and Environment, Beihang University, 100191, Beijing (PR China)

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Abstract

In situ synthesis is a powerful approach to control nanoparticle formation and consequently confers extraordinary properties upon composite membranes relative to conventional doping methods. Herein, uniform nanoparticles of cesium hydrogen salts of phosphotungstic acid (CsPW) are controllably synthesized in situ in Nafion to form CsPW–Nafion nanocomposite membranes with both improved proton conductivity and methanol-crossover suppression. A 101.3 % increase of maximum power density has been achieved relative to pristine Nafion in a direct methanol fuel cell (DMFC), indicating a potential pathway for large-scale fabrication of DMFC alternative membranes.

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