Journal
JOURNAL OF MEMBRANE SCIENCE
Volume 246, Issue 1, Pages 95-101Publisher
ELSEVIER
DOI: 10.1016/j.memsci.2004.08.016
Keywords
direct methanol fuel cell nation; polyfurfuryl alcohol; polymer electrolyte membrane; methanol crossover; nanocomposite membrane
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Commercial Nafion 115 membranes were successfully modified by in situ acid-catalyzed polymerization of furfuryl alcohol (PFA) within Nafion structures. FT-IR and AFM were used to characterize the chemical and morphological structures of the Nafion-PFA nanocomposite membrane obtained. The methanol permeation experiments showed that the methanol flux through the Nafion-PFA nanocomposite membranes dropped by a factor of 2.2-2.7 when PFA loading was 3.9-8.0 wt.%. Importantly, the proton conductivity of the membranes decreased only slightly at a low PFA loading (<8 wt.%). The nanocomposite membranes with higher selectivity (e.g., proton conductivity/methanol crossover) achieved a much higher DMFC performance at both room temperature and 60degreesC. (C) 2004 Elsevier B.V. All rights reserved.
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