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Kim, Ji Hyun
UNIST Nuclear Innovative Materials Laboratory(UNIMAT)
Research Interests
  • High temperature water corrosion
  • Liquid metal corrosion
  • Material degradation simulation


Formation of 3D graphene-Ni foam heterostructures with enhanced performance and durability for bipolar plates in a polymer electrolyte membrane fuel cell

DC Field Value Language Sim, Yeoseon ko Kwak, Jinsung ko Kim, Se-Yang ko Jo, Yongsu ko Kim, Seunghyun ko Kim, Sung Youb ko Kim, Ji Hyun ko Lee, Chi-Seung ko Jo, Jang Ho ko Kwon, Soon-Yong ko 2018-01-11T11:32:39Z - 2018-01-05 ko 2018-01 ko
dc.identifier.citation JOURNAL OF MATERIALS CHEMISTRY A, v.6, no.4, pp.1504 - 1512 ko
dc.identifier.issn 2050-7488 ko
dc.identifier.uri -
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. ko
dc.language 영어 ko
dc.title Formation of 3D graphene-Ni foam heterostructures with enhanced performance and durability for bipolar plates in a polymer electrolyte membrane fuel cell ko
dc.type ARTICLE ko
dc.identifier.scopusid 2-s2.0-85041206573 ko
dc.identifier.wosid 000423466100018 ko
dc.type.rims ART ko
dc.identifier.doi 10.1039/C7TA07598G ko
dc.identifier.url!divAbstract ko
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