TY - JOUR
T1 - Fabrication of PEFC membrane based on perfluorinated polymer using quantum beam induced grafting technique
AU - Oshima, Akihiro
AU - Sato, Yukiko
AU - Shiraki, Fumiya
AU - Mitani, Naohiro
AU - Fujii, Kazuki
AU - Oshima, Yuji
AU - Fujita, Hajime
AU - Washio, Masakazu
N1 - Funding Information:
The authors acknowledge Prof. Y. Hama of Waseda University and Dr. M. Motomatsu of DuPont KK for their helpful discussions on characterization of obtained PEM. The authors also acknowledge Retsch Co., Ltd., Dr. K. Ushida of RIKEN and Associate Prof. R. Nozaki of Hokkaido University and Dr. M. Ito of Waseda University for milling experiments. This research is supported in part by the Grant for Special Project of Waseda University , no. 2009 B-229 .
Copyright:
Copyright 2010 Elsevier B.V., All rights reserved.
PY - 2011/2
Y1 - 2011/2
N2 - The performance of a polymer electrolyte fuel cell (PEFC) is affected by the interfacial property between the proton exchange membrane (PEM) and the electrodes. Thus, development of well-laminated membrane electrode assemblies (MEAs) has been carried out. The hybrid PEM, consisting of perfluoro-sulfonic acid (PFSA) ionomer and sulfonated polystyrene grafted tetrafluoroethylene-co-hexafluoropropylene (sulfonated PS-g-FEP) synthesized by the soft electron beam (soft-EB) induced grafting method, was fabricated by mixing sulfonated PS-g-FEP with PFSA ionomer, which is coated on the interface of the PEM and the electrodes. The obtained hybrid PEM was characterized in terms of water uptake, ion exchange capacity, polarization performance and electrochemical impedance. The ion exchange capacity (IEC) of the hybrid PEM was 1.0-1.2meq/g. The polarization curve and electrochemical impedance of the hybrid PEM was analyzed. As a result, the ionic conductivity was 0.16S/cm and is the highest in the tested PEMs. The maximum power density is about 1.0W/cm2 with low humidity (relative humidity RH: 16%), which is 1.5 times higher than that of commercially available Nafion® 112.
AB - The performance of a polymer electrolyte fuel cell (PEFC) is affected by the interfacial property between the proton exchange membrane (PEM) and the electrodes. Thus, development of well-laminated membrane electrode assemblies (MEAs) has been carried out. The hybrid PEM, consisting of perfluoro-sulfonic acid (PFSA) ionomer and sulfonated polystyrene grafted tetrafluoroethylene-co-hexafluoropropylene (sulfonated PS-g-FEP) synthesized by the soft electron beam (soft-EB) induced grafting method, was fabricated by mixing sulfonated PS-g-FEP with PFSA ionomer, which is coated on the interface of the PEM and the electrodes. The obtained hybrid PEM was characterized in terms of water uptake, ion exchange capacity, polarization performance and electrochemical impedance. The ion exchange capacity (IEC) of the hybrid PEM was 1.0-1.2meq/g. The polarization curve and electrochemical impedance of the hybrid PEM was analyzed. As a result, the ionic conductivity was 0.16S/cm and is the highest in the tested PEMs. The maximum power density is about 1.0W/cm2 with low humidity (relative humidity RH: 16%), which is 1.5 times higher than that of commercially available Nafion® 112.
KW - EB-grafting
KW - EIS
KW - Hybrid PEM
KW - Sulfonated PS-g-FEP
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U2 - 10.1016/j.radphyschem.2010.07.027
DO - 10.1016/j.radphyschem.2010.07.027
M3 - Article
AN - SCOPUS:78649331020
SN - 0969-806X
VL - 80
SP - 164
EP - 168
JO - Radiation Physics and Chemistry
JF - Radiation Physics and Chemistry
IS - 2
ER -