Deterioration of Nafion 115 membrane in direct methanol fuel cells

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dc.contributor.authorShin, Se-Jongko
dc.contributor.authorBalabanovich, Aliaksandr I.ko
dc.contributor.authorKim, Hoko
dc.contributor.authorJeong, Janghwanko
dc.contributor.authorSong, Joohanko
dc.contributor.authorKim, Hee-Takko
dc.date.accessioned2013-08-14T01:44:25Z-
dc.date.available2013-08-14T01:44:25Z-
dc.date.created2013-08-08-
dc.date.created2013-08-08-
dc.date.issued2009-06-
dc.identifier.citationJOURNAL OF POWER SOURCES, v.191, no.2, pp.312 - 319-
dc.identifier.issn0378-7753-
dc.identifier.urihttp://hdl.handle.net/10203/175116-
dc.description.abstractA membrane elect rode assembly (MEA) based on a Nafion 115 membrane shows a 29% loss in power density after continuous testing in a single direct methanol fuel cell for 1000h at 50 degrees C. One of the main reasons for this behaviour is a deterioration of the membrane, namely, its ion-exchange capacity is reduced by 17%. The thermal decomposition behaviour of an untested and degraded membrane is Studied by evolved gas analysis-mass spectrometry, pyrolysis-gas chromatography-mass spectrometry, thermo-gravimetric analysis, differential scanning calorimetry, and in situ FTIR reflectance absorption spectra. The results reveal a decrease in thermal stability of the degraded membrane. The Nafion 115 membrane is suggested to lose ion-exchange capacity after the sulfonic acid group is transformed to a thermally less-stable group, Such as the persulfonic add -SO(2)OOH group during MEA operation. The Structural changes may prevent the formation of ionic clusters. (C) 2009 Elsevier B.V. All rights reserved.-
dc.languageEnglish-
dc.publisherELSEVIER SCIENCE BV-
dc.subjectTHERMAL-BEHAVIOR-
dc.subjectCROSSOVER-
dc.subjectIR-
dc.titleDeterioration of Nafion 115 membrane in direct methanol fuel cells-
dc.typeArticle-
dc.identifier.wosid000266673000016-
dc.identifier.scopusid2-s2.0-65649112188-
dc.type.rimsART-
dc.citation.volume191-
dc.citation.issue2-
dc.citation.beginningpage312-
dc.citation.endingpage319-
dc.citation.publicationnameJOURNAL OF POWER SOURCES-
dc.identifier.doi10.1016/j.jpowsour.2009.01.101-
dc.contributor.localauthorKim, Hee-Tak-
dc.contributor.nonIdAuthorShin, Se-Jong-
dc.contributor.nonIdAuthorBalabanovich, Aliaksandr I.-
dc.contributor.nonIdAuthorKim, Ho-
dc.contributor.nonIdAuthorJeong, Janghwan-
dc.contributor.nonIdAuthorSong, Joohan-
dc.type.journalArticleArticle-
dc.subject.keywordAuthorMembrane-
dc.subject.keywordAuthorEvolved gas analysis-mass spectrometry-
dc.subject.keywordAuthorPyrolysis-gas chromatography-mass spectrometry-
dc.subject.keywordAuthorDirect methanol fuel cell-
dc.subject.keywordAuthorThermal decomposition-
dc.subject.keywordAuthorPower density-
dc.subject.keywordPlusTHERMAL-BEHAVIOR-
dc.subject.keywordPlusCROSSOVER-
dc.subject.keywordPlusIR-
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