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Please use this identifier to cite or link to this item: http://hdl.handle.net/10204/4442

Title: Characterization of an anionic-exchange membranes for direct methanol alkaline fuel cells
Authors: Abuin, GC
Nonjola, P
Franceschini, EA
Izraelevitch, FH
Mathe, MK
Corti, HR
Keywords: Polysulfone
Anionic-exchange membranes
Water uptake
Mechanical properties
Ionic conductivity
Alkaline fuel cell
Hydrogen energy
Issue Date: Jun-2010
Publisher: Elsevier
Citation: Abuin, GC, Nonjola, P, Franceschini, EA et al. 2010. Characterization of an anionic-exchange membranes for direct methanol alkaline fuel cells. International Journal of Hydrogen Energy, Vol. 35(11), pp 5849-5854
Abstract: Ammonium quaternized polymers such as poly (arylene ether sulfones) are being developed and studied as candidates of ionomeric materials for application in alkaline fuel cells, due to their low cost and promising electrochemical properties. In this work, a quaternary ammonium polymer was synthesized by chloromethylation of a commercial polysulfone followed by amination process. Quaternized polysulfone membrane properties such us water and water-methanol uptake, electrical conductivity and Young’s modulus were evaluated and compared to Nafion 117, commonly employed in direct methanol fuel cells. The anionic polysulfone membrane sorbs more water than Nafion all over the whole range of water activities, but it uptakes much less methanol as compared to Nafion. The specific conductivity of the fully hydrated polysulfone membrane equilibrated with KOH solutions at ambient temperature increases with the KOH concentration, reaching a maximum of 0.083 S cm_1 for 2 M KOH, slightly less conductive than Nafion 117. The elastic modulus of the polysulfone membranes inmersed in water is similar to that reported for Nafion membranes under the same conditions. We concluded that quaternized polysulfone membrane are good candidates as electrolytes in alkaline direct methanol fuel cells.
Description: Copyright: Elsevier 2010. This is the author's post print version of the work. The definitive version is published in the International Journal of Hydrogen Energy, Vol. 35(11), pp 5849-5854
URI: http://www.sciencedirect.com/science?_ob=MImg&_imagekey=B6V3F-4Y53N97-8-C&_cdi=5729&_user=958262&_pii=S0360319909020588&_origin=search&_coverDate=06/30/2010&_sk=999649988&view=c&wchp=dGLbVtz-zSkzk&md5=c506ef70893a4336caa9dc77ff7da59e&ie=/sdarticle.pdf
http://hdl.handle.net/10204/4442
ISSN: 0360-3199
Appears in Collections:General science, engineering & technology

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