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김성엽

Kim, Sung Youb
Computational Advanced Nanomechanics Lab.
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dc.citation.endPage 1512 -
dc.citation.number 4 -
dc.citation.startPage 1504 -
dc.citation.title JOURNAL OF MATERIALS CHEMISTRY A -
dc.citation.volume 6 -
dc.contributor.author Sim, Yeoseon -
dc.contributor.author Kwak, Jinsung -
dc.contributor.author Kim, Se-Yang -
dc.contributor.author Jo, Yongsu -
dc.contributor.author Kim, Seunghyun -
dc.contributor.author Kim, Sung Youb -
dc.contributor.author Kim, Ji Hyun -
dc.contributor.author Lee, Chi-Seung -
dc.contributor.author Jo, Jang Ho -
dc.contributor.author Kwon, Soon-Yong -
dc.date.accessioned 2023-12-21T21:15:32Z -
dc.date.available 2023-12-21T21:15:32Z -
dc.date.created 2018-01-05 -
dc.date.issued 2018-01 -
dc.description.abstract Improving the lifetime and the operational stability of polymer electrolyte membrane fuel cells (PEMFCs) is critical for realizing their implementation as a practical and highly-efficient energy conversion system. However, the corrosion of metal bipolar plates, which are a key component in PEMFCs, leads to decreased efficiency and durability. Here, we prepared poly(methyl methacrylate)-derived multilayer graphene (Gr) coatings with high crystallinity and a continuous three-dimensional (3D) structure using a rapid thermal annealing (RTA) system for short periods (<= 5 min). The resulting 3D Gr-coated Ni foam is demonstrated to act as a bipolar plate with long-term operating stability. Electrochemical analysis revealed that the synthesized graphene on Ni foam outperforms bare Ni foam and amorphous-carboncoated Ni foam by providing a two-order-of-magnitude lower corrosion rate in the operating environment for a PEMFC. In addition, after stability tests in a destructive environment, the 3D Gr-coated Ni foam maintained its outstanding interfacial contact resistance of 9.3 m Omega cm(2) at 10.1 kgf cm(-2). A H-2/air PEMFC fabricated using the Gr-coated Ni foam embedded within the groove of a graphite-based bipolar plate exhibited a substantially enhanced power density of similar to 967 mW cm(-2) at a cell potential of 0.5 V with further advantages of weight reduction and no additional machinery process for the gas flow channel. This facile coating approach addresses one of the key limitations of current metal bipolar plates in PEMFCs, and paves the way to further enhance energy conversion systems through interface engineering. -
dc.identifier.bibliographicCitation JOURNAL OF MATERIALS CHEMISTRY A, v.6, no.4, pp.1504 - 1512 -
dc.identifier.doi 10.1039/C7TA07598G -
dc.identifier.issn 2050-7488 -
dc.identifier.scopusid 2-s2.0-85041206573 -
dc.identifier.uri https://scholarworks.unist.ac.kr/handle/201301/23183 -
dc.identifier.url http://pubs.rsc.org/en/content/articlelanding/2017/ta/c7ta07598g#!divAbstract -
dc.identifier.wosid 000423466100018 -
dc.language 영어 -
dc.publisher ROYAL SOC CHEMISTRYROYAL SOC CHEMISTRY -
dc.title Formation of 3D graphene-Ni foam heterostructures with enhanced performance and durability for bipolar plates in a polymer electrolyte membrane fuel cell -
dc.type Article -
dc.description.isOpenAccess FALSE -
dc.relation.journalWebOfScienceCategory Chemistry, Physical; Energy & Fuels; Materials Science, Multidisciplinary -
dc.relation.journalResearchArea Chemistry; Energy & Fuels; Materials Science -
dc.description.journalRegisteredClass scie -
dc.description.journalRegisteredClass scopus -
dc.subject.keywordPlus CHEMICAL-VAPOR-DEPOSITION -
dc.subject.keywordPlus HEXAGONAL BORON-NITRIDE -
dc.subject.keywordPlus 316L STAINLESS-STEEL -
dc.subject.keywordPlus FEW-LAYER GRAPHENE -
dc.subject.keywordPlus CORROSION-RESISTANCE -
dc.subject.keywordPlus LARGE-AREA -
dc.subject.keywordPlus COATED 304-STAINLESS-STEEL -
dc.subject.keywordPlus SURFACE CONDUCTIVITY -
dc.subject.keywordPlus FLOW DISTRIBUTOR -
dc.subject.keywordPlus CARBON-SOURCES -

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