FUEL 167 |
| We have been reporting about sulfonated poly (arylene ether)s such as sulfonated poly (ether ketone)s containing phenoxybiphenylene unit, sulfonated poly (ether sulfone)s containing fluorene unit and sulfonated poly (ether sulfone nitrile) copolymers. In those study, proton conductivities were mainly dominated by ion exchange capacity (IEC). However, dimensional stability under humidified conditions was influenced by polymer structure as well as IEC. In this study, we would like to show some trial results of MEA fabrication of sulfonated poly (arylene ether) membranes and NafionŽ impregnated electrodes using hot-pressing techniques, which involves temperature and pressure to establish a low impedance membrane-electrode interface. Without post-humidification of the membrane, MEA had difficulties to attach electrodes. On the other hand, using humidified membranes, MEA having a reasonable resistance between membrane and electrodes was obtained. This was a positive effect of water acting as plasticizer helping to produce ohmic interfacial resistance. |
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Fuel Cell Chemistry and Operation
1:35 PM-4:30 PM, Tuesday, 12 September 2006 Palace -- Gold Ballroom, Oral
Division of Fuel Chemistry |