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Kim, Guntae
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Research Interests
  • Solid Oxide Fuel Cells (SOFCs)& SOE, PEMFC, metal-air batteries, Metal-CO2 system, Catalyst for DRM

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A Nano-Structured SOFC Composite Cathode Prepared via Infiltration of La0.5Ba0.25Sr0.25Co0.8Fe0.2O3-delta into La0.9Sr0.1Ga0.8Mg0.2O3-delta for Extended Triple-Phase Boundary Area

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dc.contributor.author Lee, Seungtae ko
dc.contributor.author Kim, Seona ko
dc.contributor.author Choi, Sihyuk ko
dc.contributor.author Shin, Jeeyoung ko
dc.contributor.author Kim, Guntae ko
dc.date.available 2019-12-20T00:31:42Z -
dc.date.created 2019-08-14 ko
dc.date.issued 2019-07 ko
dc.identifier.citation JOURNAL OF THE ELECTROCHEMICAL SOCIETY, v.166, no.12, pp.F805 - F809 ko
dc.identifier.issn 0013-4651 ko
dc.identifier.uri https://scholarworks.unist.ac.kr/handle/201301/30623 -
dc.description.abstract Mixed ionic and electronic conductors (MIECs) show greatly enhanced electrochemical properties as cathode materials for intermediate-temperature solid oxide fuel cells (IT-SOFCs). Among promising MIEC candidates, La0.5Ba0.25Sr0.25Co0.8Fe0.2O3-delta (LBSCF) is chosen as a cathode material in this study due to its high oxygen ion diffusivity and oxygen reduction reaction (ORR) activity. It is well known that the composite configuration with superior oxygen ion conductor, e.g., La0.9Sr0.1Ga0.8Mg0.2O3-delta (LSGM), results in the improvement of cell performance. Here, we successfully fabricate the LBSCF-LSGM composite cathode by infiltration method at a low sintering temperature (< 800 degrees C), and thus nanoparticles are uniformly distributed on the LSGM porous scaffold. A half-cell exhibits an extremely low area-specific resistances (ASRs) of 0.010, 0.020, and 0.049 degrees cm(2) at 700, 650, and 600 degrees C, respectively. Further, the peak power density about 0.9 W cm(-2) is attained at 700 degrees C, suggesting that infiltrated LBSCF-LSGM composite demonstrates sufficient ORR activities at an intermediate temperature and thus to be a highly promising cathode material for IT-SOFCs. ko
dc.language 영어 ko
dc.publisher ELECTROCHEMICAL SOC INC ko
dc.title A Nano-Structured SOFC Composite Cathode Prepared via Infiltration of La0.5Ba0.25Sr0.25Co0.8Fe0.2O3-delta into La0.9Sr0.1Ga0.8Mg0.2O3-delta for Extended Triple-Phase Boundary Area ko
dc.type ARTICLE ko
dc.identifier.scopusid 2-s2.0-85073537343 ko
dc.identifier.wosid 000476771300001 ko
dc.type.rims ART ko
dc.identifier.doi 10.1149/2.0851912jes ko
dc.identifier.url http://jes.ecsdl.org/content/166/12/F805 ko
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