Journal
JOURNAL OF POWER SOURCES
Volume 143, Issue 1-2, Pages 136-141Publisher
ELSEVIER
DOI: 10.1016/j.jpowsour.2004.11.030
Keywords
polyphenylene oxide; phosphomolybdic acids; PPO-PMA films; direct methanol fuel cells; methanol cross-over
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The preparation and characterization of new polymer composite membranes containing polyphenylene oxide (PPO) thin films with phosphomolybdic acid (PMA) are presented. PPO thin films with PMA (PPO-PMA films) have been prepared by using the solvent mixture. In this study, methanol was used as a solvent dissolving PMA and chloroform was used as a solvent dissolving PPO. PPO-PMA solutions were cast onto a glass plate. The composite membranes were prepared by casting Nafion mixture on porous PPO-PMA films. The composite membranes were characterized by measuring their ion conductivity and methanol permeability. The morphology and structure of these PPO-PMA films were observed with scanning electron microscopy (SEM), energy dispersive spectrometer (EDS) and wave dispersive spectrometer (WDS). The composite membranes are tested as electrolytes in a direct methanol fuel cells (DMFCs). The performance tests have shown that they have a good perspective in this DMFCs. The methanol cross-over in the DMFC can be reduced by composite membranes containing PPO-PMA barrier films. (c) 2004 Elsevier B.V. All rights reserved.
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