Evaluation of PEFC membrane based on cross-linked PTFE by EB grafting

Effect of thickness for FC performance

S. Hiraiwa, T. Yoshikawa, A. Oshima, Masakazu Washio

    Research output: Contribution to journalArticle

    5 Citations (Scopus)

    Abstract

    The performance of a polymer electrolyte fuel cell (PEFC) was affected by the thickness of the thin proton exchange membrane (PEM). The PEMs with the different thickness were prepared by radiation induced grafting of styrene into the radiation-cross-linked polytetrafluoroethylene (RX-PTFE) membrane prepared from PTFE dispersion, and then sulfonated. The wet thicknesses of the obtained thin PEMs were lower than 25 μm. A PEM based on a 50 μm PTFE film, with the wet thickness of 73 μm, was also prepared under the same procedure for the comparison. The obtained PEMs were characterized in term of gas cross-over. The surface of platinum/carbon electrodes was coated with Nafion® dispersion, and then membrane electrode assembles (MEAs) were prepared by the hot-pressing. The polarization curves and electrochemical impedances of the thin PEMs in a single fuel cell were analyzed. As a result, the cell performance of the MEA based on thinner PEM tended to give higher power density and current density. On the other hand, the performance of the thinnest PEM (13 μm) decreased, and the MEA based on the thinner PEM gave the lower open circuit voltage (OCV) due to the higher gas cross-over. Thus, the thin PEM based on RX-PTFE had shown a high performance at the suitable thickness.

    Original languageEnglish
    Pages (from-to)481-485
    Number of pages5
    JournalJournal of Photopolymer Science and Technology
    Volume25
    Issue number4
    DOIs
    Publication statusPublished - 2012

    Fingerprint

    Polytetrafluoroethylene
    Proton exchange membrane fuel cells (PEMFC)
    Polytetrafluoroethylenes
    Membranes
    Protons
    Ion exchange
    Electrodes
    Fuel cells
    Gases
    Radiation
    Styrene
    Open circuit voltage
    Hot pressing
    Platinum
    Electrolytes
    Polymers
    Current density
    Carbon
    Polarization

    Keywords

    • Low energy EB
    • PEFC
    • Radiation grafting
    • Thin PEM

    ASJC Scopus subject areas

    • Materials Chemistry
    • Polymers and Plastics
    • Organic Chemistry

    Cite this

    Evaluation of PEFC membrane based on cross-linked PTFE by EB grafting : Effect of thickness for FC performance. / Hiraiwa, S.; Yoshikawa, T.; Oshima, A.; Washio, Masakazu.

    In: Journal of Photopolymer Science and Technology, Vol. 25, No. 4, 2012, p. 481-485.

    Research output: Contribution to journalArticle

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