There are no files associated with this item.
Full metadata record
DC Field | Value | Language |
---|---|---|
dc.citation.endPage | 9211 | - |
dc.citation.number | 11 | - |
dc.citation.startPage | 9202 | - |
dc.citation.title | INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | - |
dc.citation.volume | 37 | - |
dc.contributor.author | Won, Ji-Hye | - |
dc.contributor.author | Lee, Hyeon-Ji | - |
dc.contributor.author | Yoon, Kyung-Suk | - |
dc.contributor.author | Hong, Young Taik | - |
dc.contributor.author | Lee, Sang-Young | - |
dc.date.accessioned | 2023-12-22T05:08:00Z | - |
dc.date.available | 2023-12-22T05:08:00Z | - |
dc.date.created | 2014-09-17 | - |
dc.date.issued | 2012-06 | - |
dc.description.abstract | Sulfonated SBA-15 mesoporous silica (SM-SiO 2)-incorporated sulfonated poly(phenylsulfone) (SPPSU) composite membranes are fabricated for potential application in low-humidity proton exchange membrane fuel cells (PEMFCs). The SM-SiO 2 particles are synthesized using tetraethoxy silane (TEOS) as a mechanical framework precursor, Pluronic 123 triblock copolymer as a mesopore-forming template, and mercaptopropyl trimethoxysilane (MPTMS) as a sulfonation agent. A distinctive feature of the SM-SiO 2 particles is the long-range ordered 1-D skeleton of hexagonally aligned mesoporous cylindrical channels bearing sulfonic acid groups. Based on a comprehensive characterization of the SM-SiO 2 particles, the effect of SM-SiO 2 (as a functional filler) addition on the proton conductivity of the SPPSU composite membrane is examined as a function of temperature and relative humidity. An intriguing finding is that the proton conductivity of the SPPSU composite membrane exhibits a strong dependence on the relative humidity of measurement conditions. This anomalous behavior is further discussed with an in-depth consideration of the characteristics and dispersion state of SM-SiO 2 particles, which affect the tortuous path for proton movement, water uptake, and state of water. Notably, at low-humidity conditions, the SM-SiO 2 particles in the SPPSU composite membrane serve as an effective water reservoir to tightly retain water molecules and also as a supplementary proton conductor, whereas they behave as a barrier to proton transport at fully hydrated conditions. | - |
dc.identifier.bibliographicCitation | INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, v.37, no.11, pp.9202 - 9211 | - |
dc.identifier.doi | 10.1016/j.ijhydene.2012.03.036 | - |
dc.identifier.issn | 0360-3199 | - |
dc.identifier.scopusid | 2-s2.0-84861098546 | - |
dc.identifier.uri | https://scholarworks.unist.ac.kr/handle/201301/6176 | - |
dc.identifier.url | http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84861098546 | - |
dc.identifier.wosid | 000304976300029 | - |
dc.language | 영어 | - |
dc.publisher | PERGAMON-ELSEVIER SCIENCE LTD | - |
dc.title | Sulfonated SBA-15 mesoporous silica-incorporated sulfonated poly(phenylsulfone) composite membranes for low-humidity proton exchange membrane fuel cells: Anomalous behavior of humidity-dependent proton conductivity | - |
dc.type | Article | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.subject.keywordAuthor | Proton exchange membrane fuel cells | - |
dc.subject.keywordAuthor | Sulfonated SBA-15 mesoporous silica | - |
dc.subject.keywordAuthor | Sulfonated poly(phenylsulfone) | - |
dc.subject.keywordAuthor | Composite membranes | - |
dc.subject.keywordAuthor | Proton conductivity | - |
dc.subject.keywordAuthor | Low humidity | - |
dc.subject.keywordPlus | HIGH-TEMPERATURE | - |
dc.subject.keywordPlus | CONDUCTORS | - |
dc.subject.keywordPlus | STATE | - |
dc.subject.keywordPlus | WATER | - |
dc.subject.keywordPlus | PERFORMANCE | - |
dc.subject.keywordPlus | COPOLYMERS | - |
dc.subject.keywordPlus | TRANSPORT | - |
dc.subject.keywordPlus | HYDROGEN | - |
dc.subject.keywordPlus | NAFION | - |
dc.subject.keywordPlus | ION | - |
Items in Repository are protected by copyright, with all rights reserved, unless otherwise indicated.
Tel : 052-217-1404 / Email : scholarworks@unist.ac.kr
Copyright (c) 2023 by UNIST LIBRARY. All rights reserved.
ScholarWorks@UNIST was established as an OAK Project for the National Library of Korea.