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The synthesis and characteristic of an anion conductive polymer membrane for alkaline anion exchange fuel cells

Lookup NU author(s): Xu Wang, Professor Keith Scott

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Abstract

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.


Publication metadata

Author(s): Cao YC, Wang X, Scott K

Publication type: Article

Publication status: Published

Journal: Journal of Power Sources

Year: 2012

Volume: 201

Pages: 226-230

Print publication date: 06/11/2011

ISSN (print): 0378-7753

ISSN (electronic): 1873-2755

Publisher: Elsevier SA

URL: http://dx.doi.org/10.1016/j.jpowsour.2011.10.113

DOI: 10.1016/j.jpowsour.2011.10.113


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