Synthesis and characterization of PEFC membranes based on fluorinated-polymer-alloy using pre-soft-EB grafting method

Fumihiro Muto, Akihiro Oshima, Tomoyuki Kakigi, Naohiro Mitani, Akio Matsuura, Kazuki Fujii, Yukiko Sato, Jingye Li, Masakazu Washio

    研究成果: Article

    10 引用 (Scopus)

    抄録

    Polymer electrolyte fuel cell (PEFC) membranes based on thin film of crosslinked perfluorinated polymer-alloys (RX-FA) have been fabricated by soft electron beam (soft-EB) grafting with styrene monomers using soft-EB irradiation under nitrogen atmosphere at room temperature (RT). The characteristic properties of styrene-grafted materials (GRX-FA) and sulfonated materials (SRX-FA) have been measured by differential scanning calorimetry (DSC) and FT-IR spectroscopy, ionic conductivity and so on. The glass transition temperatures (dry state) of all obtained SRX-FA were about 105 ± 1 °C, which are higher than Nafion®. The ion exchange capacities of SRX-FA have been achieved about 3.3 meq/g (dry). The ionic conductivity of obtained SRX-FA has showed about 0.17 S/cm at 60 °C with relative humidity (RH) of ∼95%. The ionic conductivities of the obtained SRX-FA were higher than that of conventional perfluoro-sulfonic acid membranes (PFSA). Fabricated membrane electrode assemblies (MEAs) based on the obtained SRX-FA have shown encouraging performance in the PEFC, compared with the conventional PFSA. The power density of obtained MEAs based on the SRX-FA was about 330-340 mW/cm2 under 500 mA/cm2 at 60 °C operation. Moreover, the maximum power densities of obtained MEAs based on the SRX-FA shows about 630 mW/cm2 at 60 °C. On the other hand, the power density at 500 mA/cm2 and maximum power density of MEA based on Nafion®112 were about 320 and 590 mW/cm2 at 60 °C. Thus, the power density of the obtained SRX-FA was higher than that of conventional PFSA.

    元の言語English
    ページ(範囲)162-167
    ページ数6
    ジャーナルNuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
    265
    発行部数1
    DOI
    出版物ステータスPublished - 2007 12

    Fingerprint

    Fluorocarbon Polymers
    polymer blends
    Proton exchange membrane fuel cells (PEMFC)
    fuel cells
    Electron beams
    electrolytes
    electron beams
    membranes
    Membranes
    radiant flux density
    polymers
    Polymers
    assemblies
    synthesis
    Sulfonic Acids
    sulfonic acid
    Ionic conductivity
    ion currents
    Electrodes
    Styrene

    ASJC Scopus subject areas

    • Surfaces, Coatings and Films
    • Instrumentation
    • Surfaces and Interfaces

    これを引用

    Synthesis and characterization of PEFC membranes based on fluorinated-polymer-alloy using pre-soft-EB grafting method. / Muto, Fumihiro; Oshima, Akihiro; Kakigi, Tomoyuki; Mitani, Naohiro; Matsuura, Akio; Fujii, Kazuki; Sato, Yukiko; Li, Jingye; Washio, Masakazu.

    :: Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms, 巻 265, 番号 1, 12.2007, p. 162-167.

    研究成果: Article

    Muto, Fumihiro ; Oshima, Akihiro ; Kakigi, Tomoyuki ; Mitani, Naohiro ; Matsuura, Akio ; Fujii, Kazuki ; Sato, Yukiko ; Li, Jingye ; Washio, Masakazu. / Synthesis and characterization of PEFC membranes based on fluorinated-polymer-alloy using pre-soft-EB grafting method. :: Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms. 2007 ; 巻 265, 番号 1. pp. 162-167.
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    title = "Synthesis and characterization of PEFC membranes based on fluorinated-polymer-alloy using pre-soft-EB grafting method",
    abstract = "Polymer electrolyte fuel cell (PEFC) membranes based on thin film of crosslinked perfluorinated polymer-alloys (RX-FA) have been fabricated by soft electron beam (soft-EB) grafting with styrene monomers using soft-EB irradiation under nitrogen atmosphere at room temperature (RT). The characteristic properties of styrene-grafted materials (GRX-FA) and sulfonated materials (SRX-FA) have been measured by differential scanning calorimetry (DSC) and FT-IR spectroscopy, ionic conductivity and so on. The glass transition temperatures (dry state) of all obtained SRX-FA were about 105 ± 1 °C, which are higher than Nafion{\circledR}. The ion exchange capacities of SRX-FA have been achieved about 3.3 meq/g (dry). The ionic conductivity of obtained SRX-FA has showed about 0.17 S/cm at 60 °C with relative humidity (RH) of ∼95{\%}. The ionic conductivities of the obtained SRX-FA were higher than that of conventional perfluoro-sulfonic acid membranes (PFSA). Fabricated membrane electrode assemblies (MEAs) based on the obtained SRX-FA have shown encouraging performance in the PEFC, compared with the conventional PFSA. The power density of obtained MEAs based on the SRX-FA was about 330-340 mW/cm2 under 500 mA/cm2 at 60 °C operation. Moreover, the maximum power densities of obtained MEAs based on the SRX-FA shows about 630 mW/cm2 at 60 °C. On the other hand, the power density at 500 mA/cm2 and maximum power density of MEA based on Nafion{\circledR}112 were about 320 and 590 mW/cm2 at 60 °C. Thus, the power density of the obtained SRX-FA was higher than that of conventional PFSA.",
    keywords = "Crosslinked perfluorinated polymer-alloys, MEA, PEFC membranes, Power density, Soft-EB grafting",
    author = "Fumihiro Muto and Akihiro Oshima and Tomoyuki Kakigi and Naohiro Mitani and Akio Matsuura and Kazuki Fujii and Yukiko Sato and Jingye Li and Masakazu Washio",
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    TY - JOUR

    T1 - Synthesis and characterization of PEFC membranes based on fluorinated-polymer-alloy using pre-soft-EB grafting method

    AU - Muto, Fumihiro

    AU - Oshima, Akihiro

    AU - Kakigi, Tomoyuki

    AU - Mitani, Naohiro

    AU - Matsuura, Akio

    AU - Fujii, Kazuki

    AU - Sato, Yukiko

    AU - Li, Jingye

    AU - Washio, Masakazu

    PY - 2007/12

    Y1 - 2007/12

    N2 - Polymer electrolyte fuel cell (PEFC) membranes based on thin film of crosslinked perfluorinated polymer-alloys (RX-FA) have been fabricated by soft electron beam (soft-EB) grafting with styrene monomers using soft-EB irradiation under nitrogen atmosphere at room temperature (RT). The characteristic properties of styrene-grafted materials (GRX-FA) and sulfonated materials (SRX-FA) have been measured by differential scanning calorimetry (DSC) and FT-IR spectroscopy, ionic conductivity and so on. The glass transition temperatures (dry state) of all obtained SRX-FA were about 105 ± 1 °C, which are higher than Nafion®. The ion exchange capacities of SRX-FA have been achieved about 3.3 meq/g (dry). The ionic conductivity of obtained SRX-FA has showed about 0.17 S/cm at 60 °C with relative humidity (RH) of ∼95%. The ionic conductivities of the obtained SRX-FA were higher than that of conventional perfluoro-sulfonic acid membranes (PFSA). Fabricated membrane electrode assemblies (MEAs) based on the obtained SRX-FA have shown encouraging performance in the PEFC, compared with the conventional PFSA. The power density of obtained MEAs based on the SRX-FA was about 330-340 mW/cm2 under 500 mA/cm2 at 60 °C operation. Moreover, the maximum power densities of obtained MEAs based on the SRX-FA shows about 630 mW/cm2 at 60 °C. On the other hand, the power density at 500 mA/cm2 and maximum power density of MEA based on Nafion®112 were about 320 and 590 mW/cm2 at 60 °C. Thus, the power density of the obtained SRX-FA was higher than that of conventional PFSA.

    AB - Polymer electrolyte fuel cell (PEFC) membranes based on thin film of crosslinked perfluorinated polymer-alloys (RX-FA) have been fabricated by soft electron beam (soft-EB) grafting with styrene monomers using soft-EB irradiation under nitrogen atmosphere at room temperature (RT). The characteristic properties of styrene-grafted materials (GRX-FA) and sulfonated materials (SRX-FA) have been measured by differential scanning calorimetry (DSC) and FT-IR spectroscopy, ionic conductivity and so on. The glass transition temperatures (dry state) of all obtained SRX-FA were about 105 ± 1 °C, which are higher than Nafion®. The ion exchange capacities of SRX-FA have been achieved about 3.3 meq/g (dry). The ionic conductivity of obtained SRX-FA has showed about 0.17 S/cm at 60 °C with relative humidity (RH) of ∼95%. The ionic conductivities of the obtained SRX-FA were higher than that of conventional perfluoro-sulfonic acid membranes (PFSA). Fabricated membrane electrode assemblies (MEAs) based on the obtained SRX-FA have shown encouraging performance in the PEFC, compared with the conventional PFSA. The power density of obtained MEAs based on the SRX-FA was about 330-340 mW/cm2 under 500 mA/cm2 at 60 °C operation. Moreover, the maximum power densities of obtained MEAs based on the SRX-FA shows about 630 mW/cm2 at 60 °C. On the other hand, the power density at 500 mA/cm2 and maximum power density of MEA based on Nafion®112 were about 320 and 590 mW/cm2 at 60 °C. Thus, the power density of the obtained SRX-FA was higher than that of conventional PFSA.

    KW - Crosslinked perfluorinated polymer-alloys

    KW - MEA

    KW - PEFC membranes

    KW - Power density

    KW - Soft-EB grafting

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