Journal
JOURNAL OF POWER SOURCES
Volume 195, Issue 20, Pages 7078-7082Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2010.05.004
Keywords
Fuel cells; Membrane-electrode assembly fabrication; Membrane swelling
Funding
- Office of Naval Research MURI [N00014-07-1-0758]
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Membrane-electrode assemblies (MEAs) have been fabricated with a direct coating of the catalyst slurry by a doctor blade method on the pre-swollen Nation membrane for proton exchange membrane (PEMFC) and direct methanol fuel cells (DMFC). The effects of various swelling agents with different boiling points such as ethylene glycol (EG), diethylene glycol (DEG), triethylene glycol (TEG), tetraethylene glycol (TEEG), and glycerol in the swelling step of the membrane and the drying step of the coated catalyst have been investigated. Also, the use of dimethyl sulfoxide (DMSO) as a dispersing agent in the catalyst slurry has been investigated. Among the various swelling agents investigated, EG gives the best results with the dispersing agent DMSO offering further improvement. The MEAs fabricated with the EG-swollen membranes and DMSO as a dispersing agent in the catalyst layer show good performance in single fuel cells with hydrogen and methanol fuels. (C) 2010 Elsevier B.V. All rights reserved.
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