Performance of Hydrogen Fuel Cell MEAs Based on Perfluorinated Nanocomposite Membranes Modified by Polyaniline
JOURNAL OF THE ELECTROCHEMICAL SOCIETY(2010)
摘要
This work summarizes the results obtained from the modification of perfluorinated sulfocationic MF-4SC membranes by in situ polymerization of aniline. The transport properties of polyaniline/MF-4SC composite membranes after different times of polymerization have been analyzed. It is observed that after 3 h of aniline polymerization, composite membranes exhibit higher protonic conductivity compared to the pristine sample. The performance of fuel cells containing membrane electrode assemblies (MEAs) from MF-4SC and polyaniline/MF-4SC has also been studied. The kinetic parameters governing the voltage dependence on current density have been estimated and the results have been fitted to a previously established one-dimensional isothermal model by Springer et al. [J. Electrochem. Soc. 138, 2334 (1991)]. Good agreement between experimental data and model has been found for low density currents. Some insights about the membrane proton conductivity mechanism are given. (C) 2010 The Electrochemical Society. [DOI:10.1149/1.3439671] All rights reserved.
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