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Lookup NU author(s): Xu Wang,
Emeritus Professor Keith Scott
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An alkaline anion exchange membrane has been developed from poly (methyl vinyl ether-alt-maleic anhydride) (PMVMA) by grafting quaternary ammonium groups through a maleic anhydride ring-open reaction. FT-IR spectra showed successful grafting of quaternary ammonium groups on this cheap raw material. TGA showed that the degradation temperature was 150 degrees C which was due to the loss of the quaternary ammonium groups. The tensile stress of the resultant membrane after ion exchange was 9.0 MPa, and the Young's modulus was 0.14 GPa with a fractured elongation 11%. The through plane, anion conductivity varied from 1.9 x 10(-2) to 2.7 x 10(-2) S cm(-2) in the temperature range of 25-65 degrees C. The power density of a fuel cell with the membrane increased with the operation temperature in the range from 15 degrees C to 35 degrees C. With an ionomer loading of 15% in membrane electrode assemblies (MEA), the power density in the fuel cell was 115 mW cm(-2) and 40 mW cm(-2) for O-2 (35 degrees C) and air (30 degrees C), respectively. (C) 2011 Elsevier B.V. All rights reserved.
Author(s): Cao YC, Wang X, Scott K
Publication type: Article
Publication status: Published
Journal: Journal of Power Sources
Print publication date: 06/11/2011
ISSN (print): 0378-7753
ISSN (electronic): 1873-2755
Publisher: Elsevier SA
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