Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.14365/769
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dc.contributor.authorUctug, Fehmi Gorkem-
dc.contributor.authorNijem, Jinan-
dc.date.accessioned2023-06-16T12:47:32Z-
dc.date.available2023-06-16T12:47:32Z-
dc.date.issued2017-
dc.identifier.issn1932-2135-
dc.identifier.issn1932-2143-
dc.identifier.urihttps://doi.org/10.1002/apj.2105-
dc.identifier.urihttps://hdl.handle.net/20.500.14365/769-
dc.description.abstractSulfonated polyvinylalcohol-mordenite (SPVA-MOR) membranes for direct methanol fuel cell use were synthesized and characterized. It had earlier been found out that polyvinylalcohol-mordenite (PVA-MOR) membranes, while having excellent methanol permeability and modest proton conductivity values, had inferior direct methanol fuel cell performances than Nafion(TM). Sulfonating the polyvinylalcohol matrix had been suggested to improve the proton conductivity. In this work, polyvinylalcohol powder was sulfonated by using propane sultone as the sulfonating agent prior to the membrane synthesis. Morphological analyses revealed that the zeolite particles mixed homogeneously within the polymer matrix. Sulfonating the polymer slightly decreased both water and methanol uptakes. Both in PVA-MOR and SPVA-MOR membranes, water uptake turned out to be higher than the methanol uptake. SPVA-MOR membranes were found to have an average proton conductivity of 0.052 S center dot cm(-1) when compared with the 0.036 S center dot cm(-1) of PVA-MOR membranes, while Nafion has a proton conductivity of approximately 0.1 S center dot cm(-1). The increase in the proton conductivity upon sulfonation despite the decrease in water uptake was explained by the dominance of the Grotthuss mechanism over the vehicular mechanism for proton conductivity. Fuel cell test results showed that while SPVA-MOR membranes cannot outperform Nafion(TM), they give higher power output than PVA-MOR membranes, especially at low temperatures and high methanol concentrations. (c) 2017 Curtin University of Technology and John Wiley & Sons, Ltd.en_US
dc.language.isoenen_US
dc.publisherWileyen_US
dc.relation.ispartofAsıa-Pacıfıc Journal of Chemıcal Engıneerıngen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectdirect methanol fuel cellsen_US
dc.subjectmordeniteen_US
dc.subjectpolymer-zeolite membranesen_US
dc.subjectpolyvinylalcoholen_US
dc.subjectproton conductivityen_US
dc.subjectsulfonationen_US
dc.subjectMixed Matrix Membranesen_US
dc.subjectExchange Membranesen_US
dc.subjectComposite Membranesen_US
dc.subjectCarbon Nanotubesen_US
dc.subjectNafion(R)en_US
dc.subjectPermeabilityen_US
dc.subjectFabricationen_US
dc.subjectWateren_US
dc.titleEffect of Polymer Sulfonation on the Proton Conductivity and Fuel Cell Performance of Polyvinylalcohol-Mordenite Direct Methanol Fuel Cell Membranesen_US
dc.typeArticleen_US
dc.identifier.doi10.1002/apj.2105-
dc.identifier.scopus2-s2.0-85020231980en_US
dc.departmentİzmir Ekonomi Üniversitesien_US
dc.authoridUctug, Fehmi Gorkem/0000-0002-7231-5154-
dc.authorscopusid55239883600-
dc.authorscopusid57194441148-
dc.identifier.volume12en_US
dc.identifier.issue5en_US
dc.identifier.startpage682en_US
dc.identifier.endpage693en_US
dc.identifier.wosWOS:000413305300001en_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.identifier.scopusqualityQ3-
dc.identifier.wosqualityQ3-
item.grantfulltextembargo_20300101-
item.fulltextWith Fulltext-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.languageiso639-1en-
item.openairetypeArticle-
item.cerifentitytypePublications-
crisitem.author.dept05.10. Mechanical Engineering-
Appears in Collections:Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection
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