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Preparation of a crosslinked polyelectrolyte membrane for fuel cells with an allyl methacrylate based two-step reaction

Authors

  • Akira Kishi,

    1. Department of Materials Science Technology, Nagaoka University of Technology, Kamitomioka 1603-1, Nagaoka, Niigata, Japan
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  • Minoru Umeda

    Corresponding author
    1. Department of Materials Science Technology, Nagaoka University of Technology, Kamitomioka 1603-1, Nagaoka, Niigata, Japan
    • Department of Materials Science Technology, Nagaoka University of Technology, Kamitomioka 1603-1, Nagaoka, Niigata, Japan
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Abstract

In this study, a proton-exchange membrane for fuel cells was prepared via a two-step reaction with an allyl methacrylate (AMA) as an asymmetric crosslinking agent. First, a linear-chain polymer was synthesized, consisting of hydrophilic 2-acrylamido-2-methylpropanesulfonic acid (AMPS), hydrophobic 2,2,2-trifluoroethyl methacrylate (TFEMA), and AMA. Subsequently, we crosslinked the linear-chain polymer by reacting the remaining allyl group during dry heating. The proton conductivity of the prepared membrane was 7 × 10−2 S/cm at room temperature. The membrane was characterized by Fourier transform infrared spectroscopy, differential scanning calorimetry, and atomic force microscopy. The polymer electrolyte membrane fuel cell (PEMFC) performance was evaluated for a membrane electrode assembly composed of the crosslinked AMPS–TFEMA–AMA/ fluoroalkyl graft polymer (FGP) membrane. As a result of a power-generation test, a maximum power density of 174 mW/cm2 at a current density of 400 mA/cm2 was observed for a PEMFC single cell. Consequently, it was confirmed that the AMPS–TFEMA–AMA/FGP membrane for PEMFC could easily be prepared via a two-step reaction at a low cost and that PEMFC exhibited a cell performance and that of cells with the Nafion membrane. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2009

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