An analysis of the water transport properties of polymer electrolyte membrane

K. Aotani, S. Miyazaki, N. Kubo, Masafumi Katsuta

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    26 Citations (Scopus)

    Abstract

    Water transport resistance through the polymer electrolyte membrane was evaluated by measuring the water permeability of it. From the results of a thickness sensitivity evaluation, two types of water transport resistance were found. One was "internal diffusion resistance," which was proportional to the membrane thickness, and the other was "interfacial transport resistance," which was independent of thickness. This interfacial resistance was found not to be negligible. Furthermore, both resistances showed sensitivity to temperature and relative humidity. The internal diffusion coefficient estimated from the results of water permeation experiments correlated well with the results obtained by the pulse field gradient nuclear magnetic resonance (PFG-NMR) method. And, the electro-osmotic drag coefficient was also measured by the proton pump balance method based on the water permeation test system(1). It was concluded that water permeation experiments are helpful for obtaining a better fundamental understanding of water transport mechanism through the membrane.

    Original languageEnglish
    Title of host publicationECS Transactions
    Pages341-352
    Number of pages12
    Volume16
    Edition2 PART 1
    DOIs
    Publication statusPublished - 2008
    EventProton Exchange Membrane Fuel Cells 8, PEMFC - 214th ECS Meeting - Honolulu, HI
    Duration: 2008 Oct 122008 Oct 17

    Other

    OtherProton Exchange Membrane Fuel Cells 8, PEMFC - 214th ECS Meeting
    CityHonolulu, HI
    Period08/10/1208/10/17

    ASJC Scopus subject areas

    • Engineering(all)

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