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DC Field | Value | Language |
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dc.citation.endPage | 4659 | - |
dc.citation.number | 15 | - |
dc.citation.startPage | 4653 | - |
dc.citation.title | JOURNAL OF POWER SOURCES | - |
dc.citation.volume | 195 | - |
dc.contributor.author | Kim, Youngkwon | - |
dc.contributor.author | Choi, Younggeun | - |
dc.contributor.author | Kim, Hae Kyoung | - |
dc.contributor.author | Lee, Jae Sung | - |
dc.date.accessioned | 2023-12-22T07:06:21Z | - |
dc.date.available | 2023-12-22T07:06:21Z | - |
dc.date.created | 2015-07-28 | - |
dc.date.issued | 2010-08 | - |
dc.description.abstract | A new organic sulfonic acid moiety is grafted on the surface of montmorillonite (MMT) by a condensation reaction of the surface hydroxyl group of MMT with the thiol group of 3-mercaptopropyltrimethoxy silane (3-MPTMS), and simultaneously attaching sulfonic acid group by a ring opening reaction of 1,3-propane sultone. The new method produces MMT functionalized with sulfonic acid of a longer chain length in a simple one-step reaction and shows higher ion-exchange capacity and thermal stability than MMT grafted by a two-step method of 3-MPTMS condensation followed by oxidation with H(2)O(2). Using these functionalized MMTs as inorganic fillers, organic-inorganic composite, proton-conducting membranes are cast together with Nafion (R). The composite membrane with MMT grafted with the long-chain sulfonic acid shows increased water uptake, while maintaining comparable ionic conductivity relative to a pristine Nation membrane. This leads to much enhanced performance of a proton-exchange membrane fuel cell without external humidification of reactant gases. For instance, the current density at 0.5 V of the membrane-electrode assembly (MEA) fabricated with a composite membrane containing MMT with the long-chain organic sulfonic acid is about twice that of a MEA fabricated with a composite membrane containing MMT with short-chain organic sulfonic acids and about three times higher than that with pristine Nation 212. (C) 2010 Elsevier B.V. All rights reserved | - |
dc.identifier.bibliographicCitation | JOURNAL OF POWER SOURCES, v.195, no.15, pp.4653 - 4659 | - |
dc.identifier.doi | 10.1016/j.jpowsour.2010.01.087 | - |
dc.identifier.issn | 0378-7753 | - |
dc.identifier.scopusid | 2-s2.0-77950298741 | - |
dc.identifier.uri | https://scholarworks.unist.ac.kr/handle/201301/12850 | - |
dc.identifier.url | http://www.sciencedirect.com/science/article/pii/S0378775310002545 | - |
dc.identifier.wosid | 000277820500014 | - |
dc.language | 영어 | - |
dc.publisher | ELSEVIER SCIENCE BV | - |
dc.title.alternative | New sulfonic acid moiety grafted on montmorillonite as filler of organic-inorganic composite membrane for non-humidified proton-exchange membrane fuel cells | - |
dc.title | New sulfonic acid moiety grafted on montmorillonite as filler of organic-inorganic composite membrane for non-humidified proton-exchange membrane fuel cells | - |
dc.type | Article | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
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