Modification of Nafion Proton Exchange Membranes to Reduce Methanol Crossover in PEM Fuel Cells
Open Access
- 1 January 1999
- journal article
- Published by The Electrochemical Society in Electrochemical and Solid-State Letters
- Vol. 3 (12) , 529-531
- https://doi.org/10.1149/1.1391199
Abstract
Commercial sulfonated fluorocarbon membranes (Nafion) have been impregnated with poly(1‐methylpyrrole) by in situ polymerization. This can lead to a decrease of more than 90% in the permeability of the membranes to methanol, although the ionic resistance of such heavily loaded membranes becomes too high for high power fuel cells. At lower poly(1‐methylpyrrole) loadings, a decrease in methanol permeability by as much as 50% can be realized without a significant increase in ionic resistance. Such modified membranes can provide comparable performances to the original membranes in hydrogen fuel cells. ©2000 The Electrochemical SocietyKeywords
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