Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | 이성철 | - |
dc.date.accessioned | 2018-04-02T07:01:24Z | - |
dc.date.available | 2018-04-02T07:01:24Z | - |
dc.date.issued | 2014-01 | - |
dc.identifier.citation | CHEMSUSCHEM,2014,7(2), p 466-473(8) | en_US |
dc.identifier.issn | 1864-5631 | - |
dc.identifier.uri | http://onlinelibrary.wiley.com/doi/abs/10.1002/cssc.201301043 | - |
dc.identifier.uri | http://hdl.handle.net/20.500.11754/54832 | - |
dc.description.abstract | A dual-electrode membrane electrode assembly (MEA) for proton exchange membrane fuel cells with enhanced polarization under zero relative humidity (RH) is fabricated by introducing a phase-separated morphology in an agglomerated catalyst layer of Pt/C (platinum on carbon black) and Nafion. In the catalyst layer, a sufficient level of phase separation is achieved by dispersing the Pt catalyst and the Nafion dispersion in a mixed-solvent system (propane-1,2,3-triol/1-methyl-2-pyrrolidinone). The high polymer chain mobility results in improved water uptake and regular pore-size distribution with small pore diameters. The electrochemical performance of the dual-film electrode assembly with different levels of phase separation is compared to conventional electrode assemblies. As a result, good performance at 0% RH is obtained because self-humidification is dramatically improved by attaching this dense and phase-separated catalytic overlayer onto the conventional catalyst layer. A MEA prepared using the thin-film, dual-layered electrode exhibits 39-fold increased RH stability and 28-fold improved start-up recovery time during the on-off operation relative to the conventional device. We demonstrate the successful operation of the dual-layered electrode comprised of discriminatively phase-separated agglomerates with an ultrahigh zero RH fuel-cell performance reaching over 95% performance of a fully humidified MEA. | en_US |
dc.description.sponsorship | This work was supported by the Basic Science Research Programthrough the National Research Foundation of Korea (NRF),funded by the Ministry of Education, Science and Technology(2010-0024794). The authors are grateful for the financial support. | en_US |
dc.language.iso | en | en_US |
dc.publisher | WILEY-V C H VERLAG GMBH, BOSCHSTRASSE 12, D-69469 WEINHEIM, GERMANY | en_US |
dc.title | Ultrahigh PEMFC Performance of a Thin-Film, Dual-electrode Assembly with Tailored Electrode Morphology | en_US |
dc.type | Article | en_US |
dc.relation.volume | 7 | - |
dc.identifier.doi | 10.1002/cssc.201301043 | - |
dc.relation.page | 466-473 | - |
dc.relation.journal | CHEMSUSCHEM | - |
dc.contributor.googleauthor | Jung, Chi-Young | - |
dc.contributor.googleauthor | Kim, Tae-Hyun | - |
dc.contributor.googleauthor | Yi, Sung-Chul | - |
dc.relation.code | 2014027145 | - |
dc.sector.campus | S | - |
dc.sector.daehak | COLLEGE OF ENGINEERING[S] | - |
dc.sector.department | DEPARTMENT OF CHEMICAL ENGINEERING | - |
dc.identifier.pid | scyi | - |
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