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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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Correlation between fast oxygen kinetics and enhanced performance in Fe doped layered perovskite cathode for solid oxide fuel cells

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Title
Correlation between fast oxygen kinetics and enhanced performance in Fe doped layered perovskite cathode for solid oxide fuel cells
Author
Jun, AreumYoo, SeonyoungJu, Young-WanHyodo, JunjiChoi, SihyukJeong, Hu YoungShin, JeeyoungIshihara, TatsumniLim,Tak-HyoungKim, Guntae
Issue Date
2015-08
Publisher
ROYAL SOC CHEMISTRYROYAL SOC CHEMISTRY
Citation
JOURNAL OF MATERIALS CHEMISTRY A, v.3, no.29, pp.15082 - 15090
Abstract
Many researchers have recently focused on layered perovskite oxides as cathode materials for solid oxide fuel cells because of their much higher chemical diffusion and surface exchange coefficients relative to those of ABO(3)-type perovskite oxides. Herein, we study the catalytic effect of Fe doping into SmBa0.5Sr0.5Co2O5+delta on the oxygen reduction reaction (ORR) and investigate the optimal Fe substitution through an analysis of the structural characteristics, electrical properties, redox properties, oxygen kinetics, and electrochemical performance of SmBa0.5Sr0.5Co2-xFexO5+delta (x = 0, 0.25, 0.5, 0.75, and 1.0). The optimal Fe substitution, SmBa0.5Sr0.5Co1.5Fe0.5O5+delta, enhanced the performance and redox stability remarkably and also led to satisfactory electrical properties and electrochemical performance due to its fast oxygen bulk diffusion and high surface kinetics under typical fuel cell operating conditions. The results suggest that SmBa0.5Sr0.5Co1.5Fe0.5O5+delta is a promising cathode material for intermediate-temperature solid oxide fuel cells (IT-SOFCs).
URI
https://scholarworks.unist.ac.kr/handle/201301/13050
URL
http://pubs.rsc.org/en/content/articlelanding/2015/ta/c5ta02158h#!divAbstract
DOI
10.1039/C5TA02158H
ISSN
2050-7488
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