Volume 42, Issue 2 (March 2014)

    Investigation of Hygro-Thermal Cycle Effects on the Membranes of Proton Exchange Membrane Fuel Cells

    (Received 11 June 2012; accepted 5 August 2013)

    Published Online: 2013

    CODEN: JTEOAD

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    Abstract

    Nafion is the most commonly used membrane material in proton exchange membrane fuel cells. New and used membrane electrode assemblies (MEAs) are subjected to dynamic mechanical analysis (DMA) tests in temperature scan mode to determine the effect of catalyst coating and hygro-thermal aging. DMA tests are also performed using specimens obtained from the rolling and transverse directions to investigate the anisotropic effects of the membrane and the coating. The catalyst coating increases the stiffness and brittleness of the membrane. Increased stiffness is observed in used MEAs relative to new MEAs, which indicates that hygro-thermal aging increases the brittleness of the material. A slight dependence on direction—that is, anisotropy—is also determined.


    Author Information:

    Colak, Ozgen
    Dept. of Mechanical Engineering, Yildiz Technical Univ., Istanbul,

    Acar, Alperen
    Dept. of Mechanical Engineering, Yildiz Technical Univ., Istanbul,

    Ergenekon, Emre
    Dept. of Mechanical Engineering, Yildiz Technical Univ., Istanbul,


    Stock #: JTE20120201

    ISSN: 0090-3973

    DOI: 10.1520/JTE20120201

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    Author
    Title Investigation of Hygro-Thermal Cycle Effects on the Membranes of Proton Exchange Membrane Fuel Cells
    Symposium , 0000-00-00
    Committee D20