Small-angle neutron scattering study of polymer electrolyte fuel cell; Ionomer and water adsorption in the membrane electrode assembly

Putra, A.; Yamaguchi, Daisuke; Koizumi, Satoshi

SANS was used to study the ionomer and water adsorption in the MEA of PEFC. Scattering maximum is so called the ionomer peak appeared at q = 0.17 $^{-1}$ which is correspond to ion cluster of nafion in the dry real MEA. In the H $_{2}$ O-hydrated condition, the ionomer peak position shifted to the lower q, and the peak-high increased indicating adsorption of water in ion cluster. In the operating PEFC, hydrogen, H $_{2}$ and deuterated, D $_{2}$ gas was employed as a fuel to perform a contrast variation as for Nafion. By changing the fuel gas from H $_{2}$ to D $_{2}$ , SANS quantitatively detected decreasing of scattering intensity at scattering maximum originating from the ion-channel in the electrolyte. In a stationary state of fuel cell operation using D $_{2}$ , the scattering intensity rhythmically oscillates.

Language	:	English
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Meeting title	:	15th International Small-Angle Scattering Conference (SAS 2012)
Held date	:	2012/11
Location (city)	:	Sydney
Location (country)	:	Australia
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Keywords	:	no keyword
Research Facility	:	JRR-3M(研究炉3)
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Cooperating Institute	:	新エネルギー・産業技術総合開発機構

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Registration No. : BB20122620
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