Fabrication of function-graded proton exchange membranes for direct methanol fuel cells using electron beam-grafting

R. Tsuchida, S. Hiraiwa, A. Tsukamoto, Masakazu Washio, A. Oshima

    Research output: Contribution to journalArticle

    3 Citations (Scopus)

    Abstract

    Function-graded proton exchange membranes (G-PEMs) based on poly(tetrafluoroethylene-co-hexafluoropropylene) were fabricated for direct methanol fuel cells (DMFCs) via electron beam-grafting using the heterogeneous energy deposition technique. The G-PEMs had a water uptake gradient in the proton transfer direction, originating from the sulfonic acid group gradient. The distribution of sulfonic acid groups in the various G-PEMs was evaluated using X-ray photoelectron spectroscopy. Four types of PEMs (flat-type, strong-gradient, meso-gradient, and weak-gradient types) were fabricated. By varying the direction of the G-PEMs, the methanol permeation test and DMFC operation were performed with two orientations of the sulfonic acid group gradient, decreasing from the methanol injection (anode) side (decrease-type) or the other (cathode) side (increase-type). The methanol permeability of the strong-gradient, meso-gradient, and weak-gradient G-PEMs was lower than that of Nafion®117 and the flat-type PEM. The "increase-type" orientation of the strong-gradient G-PEM resulted in the lowest methanol permeability. The DMFC performance of the G-PEMs was influenced by the thickness direction, such as "decrease-type" and "increase-type." The performance of the "decrease-type" assembly was higher than that of the "increase-type." The "decrease-type" assembly with P-200 k (weak-gradient G-PEM) exhibited the highest performance of the fabricated PEMs, comparable to that of Nafion®117.

    Original languageEnglish
    Pages (from-to)284-290
    Number of pages7
    JournalFuel Cells
    Volume14
    Issue number2
    DOIs
    Publication statusPublished - 2014

    Fingerprint

    Direct methanol fuel cells (DMFC)
    Electron beams
    Ion exchange
    Protons
    Membranes
    Fabrication
    Methanol
    Acids
    Proton transfer
    Polytetrafluoroethylenes
    Permeation
    Anodes
    Cathodes
    X ray photoelectron spectroscopy

    Keywords

    • Direct Methanol Fuel Cells
    • Electron Beam-Grafting
    • Fuel Cells
    • Function-Graded Proton Exchange Membranes
    • Membranes
    • Methanol Crossover
    • Polymers

    ASJC Scopus subject areas

    • Renewable Energy, Sustainability and the Environment
    • Energy Engineering and Power Technology

    Cite this

    Fabrication of function-graded proton exchange membranes for direct methanol fuel cells using electron beam-grafting. / Tsuchida, R.; Hiraiwa, S.; Tsukamoto, A.; Washio, Masakazu; Oshima, A.

    In: Fuel Cells, Vol. 14, No. 2, 2014, p. 284-290.

    Research output: Contribution to journalArticle

    Tsuchida, R. ; Hiraiwa, S. ; Tsukamoto, A. ; Washio, Masakazu ; Oshima, A. / Fabrication of function-graded proton exchange membranes for direct methanol fuel cells using electron beam-grafting. In: Fuel Cells. 2014 ; Vol. 14, No. 2. pp. 284-290.
    @article{5618ea20e4d244ec8556bc64a3c3c7ad,
    title = "Fabrication of function-graded proton exchange membranes for direct methanol fuel cells using electron beam-grafting",
    abstract = "Function-graded proton exchange membranes (G-PEMs) based on poly(tetrafluoroethylene-co-hexafluoropropylene) were fabricated for direct methanol fuel cells (DMFCs) via electron beam-grafting using the heterogeneous energy deposition technique. The G-PEMs had a water uptake gradient in the proton transfer direction, originating from the sulfonic acid group gradient. The distribution of sulfonic acid groups in the various G-PEMs was evaluated using X-ray photoelectron spectroscopy. Four types of PEMs (flat-type, strong-gradient, meso-gradient, and weak-gradient types) were fabricated. By varying the direction of the G-PEMs, the methanol permeation test and DMFC operation were performed with two orientations of the sulfonic acid group gradient, decreasing from the methanol injection (anode) side (decrease-type) or the other (cathode) side (increase-type). The methanol permeability of the strong-gradient, meso-gradient, and weak-gradient G-PEMs was lower than that of Nafion{\circledR}117 and the flat-type PEM. The {"}increase-type{"} orientation of the strong-gradient G-PEM resulted in the lowest methanol permeability. The DMFC performance of the G-PEMs was influenced by the thickness direction, such as {"}decrease-type{"} and {"}increase-type.{"} The performance of the {"}decrease-type{"} assembly was higher than that of the {"}increase-type.{"} The {"}decrease-type{"} assembly with P-200 k (weak-gradient G-PEM) exhibited the highest performance of the fabricated PEMs, comparable to that of Nafion{\circledR}117.",
    keywords = "Direct Methanol Fuel Cells, Electron Beam-Grafting, Fuel Cells, Function-Graded Proton Exchange Membranes, Membranes, Methanol Crossover, Polymers",
    author = "R. Tsuchida and S. Hiraiwa and A. Tsukamoto and Masakazu Washio and A. Oshima",
    year = "2014",
    doi = "10.1002/fuce.201200226",
    language = "English",
    volume = "14",
    pages = "284--290",
    journal = "Fuel Cells",
    issn = "1615-6846",
    publisher = "John Wiley and Sons Ltd",
    number = "2",

    }

    TY - JOUR

    T1 - Fabrication of function-graded proton exchange membranes for direct methanol fuel cells using electron beam-grafting

    AU - Tsuchida, R.

    AU - Hiraiwa, S.

    AU - Tsukamoto, A.

    AU - Washio, Masakazu

    AU - Oshima, A.

    PY - 2014

    Y1 - 2014

    N2 - Function-graded proton exchange membranes (G-PEMs) based on poly(tetrafluoroethylene-co-hexafluoropropylene) were fabricated for direct methanol fuel cells (DMFCs) via electron beam-grafting using the heterogeneous energy deposition technique. The G-PEMs had a water uptake gradient in the proton transfer direction, originating from the sulfonic acid group gradient. The distribution of sulfonic acid groups in the various G-PEMs was evaluated using X-ray photoelectron spectroscopy. Four types of PEMs (flat-type, strong-gradient, meso-gradient, and weak-gradient types) were fabricated. By varying the direction of the G-PEMs, the methanol permeation test and DMFC operation were performed with two orientations of the sulfonic acid group gradient, decreasing from the methanol injection (anode) side (decrease-type) or the other (cathode) side (increase-type). The methanol permeability of the strong-gradient, meso-gradient, and weak-gradient G-PEMs was lower than that of Nafion®117 and the flat-type PEM. The "increase-type" orientation of the strong-gradient G-PEM resulted in the lowest methanol permeability. The DMFC performance of the G-PEMs was influenced by the thickness direction, such as "decrease-type" and "increase-type." The performance of the "decrease-type" assembly was higher than that of the "increase-type." The "decrease-type" assembly with P-200 k (weak-gradient G-PEM) exhibited the highest performance of the fabricated PEMs, comparable to that of Nafion®117.

    AB - Function-graded proton exchange membranes (G-PEMs) based on poly(tetrafluoroethylene-co-hexafluoropropylene) were fabricated for direct methanol fuel cells (DMFCs) via electron beam-grafting using the heterogeneous energy deposition technique. The G-PEMs had a water uptake gradient in the proton transfer direction, originating from the sulfonic acid group gradient. The distribution of sulfonic acid groups in the various G-PEMs was evaluated using X-ray photoelectron spectroscopy. Four types of PEMs (flat-type, strong-gradient, meso-gradient, and weak-gradient types) were fabricated. By varying the direction of the G-PEMs, the methanol permeation test and DMFC operation were performed with two orientations of the sulfonic acid group gradient, decreasing from the methanol injection (anode) side (decrease-type) or the other (cathode) side (increase-type). The methanol permeability of the strong-gradient, meso-gradient, and weak-gradient G-PEMs was lower than that of Nafion®117 and the flat-type PEM. The "increase-type" orientation of the strong-gradient G-PEM resulted in the lowest methanol permeability. The DMFC performance of the G-PEMs was influenced by the thickness direction, such as "decrease-type" and "increase-type." The performance of the "decrease-type" assembly was higher than that of the "increase-type." The "decrease-type" assembly with P-200 k (weak-gradient G-PEM) exhibited the highest performance of the fabricated PEMs, comparable to that of Nafion®117.

    KW - Direct Methanol Fuel Cells

    KW - Electron Beam-Grafting

    KW - Fuel Cells

    KW - Function-Graded Proton Exchange Membranes

    KW - Membranes

    KW - Methanol Crossover

    KW - Polymers

    UR - http://www.scopus.com/inward/record.url?scp=84898548519&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=84898548519&partnerID=8YFLogxK

    U2 - 10.1002/fuce.201200226

    DO - 10.1002/fuce.201200226

    M3 - Article

    VL - 14

    SP - 284

    EP - 290

    JO - Fuel Cells

    JF - Fuel Cells

    SN - 1615-6846

    IS - 2

    ER -