Journal
JOURNAL OF POWER SOURCES
Volume 96, Issue 2, Pages 411-414Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/S0378-7753(00)00602-9
Keywords
direct-methanol fuel cell; surface modification; methanol cross-over; methanol permeability
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In order to reduce methanol cross-over to the positive electrode in a direct-methanol fuel cell (DMFC), the concept of modifying the morphology of the proton-conducting membrane is proposed. The method involves using plasma etching and palladium-sputtering on a Nafion (TM) polymer membrane. Methanol permeability tests were conducted in a specially-designed cell. Plasma etching of Nafion (TM) membrane increases the roughness of the membrane surface and decreases the methanol permeability. The sputtering of palladium on the plasma-etched Nafion (TM) further decreases the methanol cross-over. Improved DMFC performance curves are obtained in a single cell which contains the modified Nafion (TM). (C), 2001 Elsevier Science B.V. All rights reserved.
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