Nafion®/ODF-silica composite membranes for medium temperature proton exchange membrane fuel cells

Handle URI:
http://hdl.handle.net/10754/563318
Title:
Nafion®/ODF-silica composite membranes for medium temperature proton exchange membrane fuel cells
Authors:
Treekamol, Yaowapa; Schieda, Mauricio; Robitaille, Lucie; MacKinnon, Sean M.; Mokrini, Asmae; Shi, Zhiqing; Holdcroft, Steven; Schulte, Karl I.; Nunes, Suzana Pereira ( 0000-0002-3669-138X )
Abstract:
A series of composite membranes were prepared by dispersing fluorinated polyoxadiazole oligomer (ODF)-functionalized silica nanoparticles in a Nafion matrix. Both melt-extrusion and solvent casting processes were explored. Ion exchange capacity, conductivity, water uptake and dimensional stability, thermal stability and morphology were characterized. The inclusion of functionalized nanoparticles proved advantageous, mainly due to a physical crosslinking effect and better water retention, with functionalized nanoparticles performing better than the pristine silica particles. For the same filler loading, better nanoparticle dispersion was achieved for solvent-cast membranes, resulting in higher proton conductivity. Filler agglomeration, however,was more severe for solvent-castmembranes at loadings beyond 5wt.%. The composite membranes showed excellent thermal stability, allowing for operation in medium temperature PEM fuel cells. Fuel cell performance of the compositemembranesdecreaseswithdecreasing relativehumidity, but goodperformance values are still obtained at 34% RHand 90 °C,with the best results obtained for solvent castmembranes loaded with 10 wt.% ODF-functionalized silica. Hydrogen crossover of the composite membranes is higher than that forpureNafion membranes,possiblydue toporosityresulting fromsuboptimalparticle- matrixcompatibility. © 2013 Crown Copyright and Elsevier BV. All rights reserved.
KAUST Department:
Water Desalination and Reuse Research Center (WDRC); Biological and Environmental Sciences and Engineering (BESE) Division; Environmental Science and Engineering Program; Nanostructured Polymeric Membrane Lab
Publisher:
Elsevier BV
Journal:
Journal of Power Sources
Issue Date:
Jan-2014
DOI:
10.1016/j.jpowsour.2013.01.178
Type:
Article
ISSN:
03787753
Sponsors:
The authors would like to thank S. Neumann and Dr. T. Emmler for their contribution to the SEM, and thermal characterizations; F. Vachon, N. Raymond, and P. Le Marquand for their contribution to membrane and MEA processing and characterization. The authors gratefully acknowledge the funding provided by the NRC-Helmholtz Association Cooperation project on MEAs for high temperature fuel cells. Finally, the authors would like to acknowledge the editor's insightful comments.
Appears in Collections:
Articles; Environmental Science and Engineering Program; Water Desalination and Reuse Research Center (WDRC); Biological and Environmental Sciences and Engineering (BESE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorTreekamol, Yaowapaen
dc.contributor.authorSchieda, Mauricioen
dc.contributor.authorRobitaille, Lucieen
dc.contributor.authorMacKinnon, Sean M.en
dc.contributor.authorMokrini, Asmaeen
dc.contributor.authorShi, Zhiqingen
dc.contributor.authorHoldcroft, Stevenen
dc.contributor.authorSchulte, Karl I.en
dc.contributor.authorNunes, Suzana Pereiraen
dc.date.accessioned2015-08-03T11:45:36Zen
dc.date.available2015-08-03T11:45:36Zen
dc.date.issued2014-01en
dc.identifier.issn03787753en
dc.identifier.doi10.1016/j.jpowsour.2013.01.178en
dc.identifier.urihttp://hdl.handle.net/10754/563318en
dc.description.abstractA series of composite membranes were prepared by dispersing fluorinated polyoxadiazole oligomer (ODF)-functionalized silica nanoparticles in a Nafion matrix. Both melt-extrusion and solvent casting processes were explored. Ion exchange capacity, conductivity, water uptake and dimensional stability, thermal stability and morphology were characterized. The inclusion of functionalized nanoparticles proved advantageous, mainly due to a physical crosslinking effect and better water retention, with functionalized nanoparticles performing better than the pristine silica particles. For the same filler loading, better nanoparticle dispersion was achieved for solvent-cast membranes, resulting in higher proton conductivity. Filler agglomeration, however,was more severe for solvent-castmembranes at loadings beyond 5wt.%. The composite membranes showed excellent thermal stability, allowing for operation in medium temperature PEM fuel cells. Fuel cell performance of the compositemembranesdecreaseswithdecreasing relativehumidity, but goodperformance values are still obtained at 34% RHand 90 °C,with the best results obtained for solvent castmembranes loaded with 10 wt.% ODF-functionalized silica. Hydrogen crossover of the composite membranes is higher than that forpureNafion membranes,possiblydue toporosityresulting fromsuboptimalparticle- matrixcompatibility. © 2013 Crown Copyright and Elsevier BV. All rights reserved.en
dc.description.sponsorshipThe authors would like to thank S. Neumann and Dr. T. Emmler for their contribution to the SEM, and thermal characterizations; F. Vachon, N. Raymond, and P. Le Marquand for their contribution to membrane and MEA processing and characterization. The authors gratefully acknowledge the funding provided by the NRC-Helmholtz Association Cooperation project on MEAs for high temperature fuel cells. Finally, the authors would like to acknowledge the editor's insightful comments.en
dc.publisherElsevier BVen
dc.subjectFuel cellen
dc.subjectFunctionalized silicaen
dc.subjectNafionen
dc.subjectNanocompositeen
dc.subjectPolymer electrolyte membraneen
dc.titleNafion®/ODF-silica composite membranes for medium temperature proton exchange membrane fuel cellsen
dc.typeArticleen
dc.contributor.departmentWater Desalination and Reuse Research Center (WDRC)en
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Divisionen
dc.contributor.departmentEnvironmental Science and Engineering Programen
dc.contributor.departmentNanostructured Polymeric Membrane Laben
dc.identifier.journalJournal of Power Sourcesen
dc.contributor.institutionInstitute of Materials Research, Helmholtz-Zentrum Geesthacht, Max-Planck-Strasse 1, 21502 Geesthacht, Germanyen
dc.contributor.institutionNRC Industrial Materials Institute, 75 de Mortagne Boulevard, Boucherville, QC J4B 6Y4, Canadaen
dc.contributor.institutionEnergy, Mining and Environment, National Research Council Canada, 4250 Wesbrook Mall, Vancouver, BC V6T 1W5, Canadaen
dc.contributor.institutionInstitut M-11, Technische Universität Hamburg-Harburg, Denickestrasse 15, 21073 Hamburg, Germanyen
kaust.authorNunes, Suzana Pereiraen
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