Development of sulfonated FEP-Nafion hybrid proton exchange membranes for PEFC

Y. Sato, K. Fujii, N. Mitani, A. Matsuura, T. Kakigi, F. Muto, J. Li, A. Oshima, M. Washio

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Abstract

The performance of polymer electrolyte fuel cell (PEFC) is affected by an interfacial property between a proton exchange membrane (PEM) and electrodes. Thus, to develop a well-laminated membrane electrode assembly (MEA), a hybrid PEM (FN) was fabricated by mixing a radiation grafted membrane (sulfonated FEP) with ionomer (Nafion® dispersion) which is applied to coat the interface of the PEM and electrodes. The obtained FN, sulfonated FEP and Nafion®112 were characterized in terms of water uptake, ion exchange capacity (IEC), polarization performance and electrochemical impedance. FN showed high IEC and water uptake, which would induce the highest ionic conductivity (IC) among tested PEMs. In terms of FN, the interface between the PEM and electrodes should have been improved because FN showed the lowest charge transfer resistance than other tested PEMs. The high IC and improved interface between the PEM and electrodes resulted in the best cell performance of FN in tested PEMs.

Original languageEnglish
Pages (from-to)213-216
Number of pages4
JournalNuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Volume265
Issue number1
DOIs
Publication statusPublished - 2007 Dec 1

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Keywords

  • 61.82.Pv
  • Electrochemical impedance spectroscopy (EIS)
  • PEFC
  • PEM
  • Radiation grafting

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation

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