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Kim, Guntae
GUNS Lab
Research Interests
  • Solid Oxide Fuel Cells (SOFCs)& SOE, metal-air batteries, ceramic membranes, PEMFC

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Electrochemical properties of B-site Ni doped layered perovskite cathodes for IT-SOFCs

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Title
Electrochemical properties of B-site Ni doped layered perovskite cathodes for IT-SOFCs
Author
Jun, AreumLim, Tak-hyoungShin, JeeyoungKim, Guntae
Keywords
Cathode; Electrochemical performance; Layered perovskite; Solid oxide fuel cells (SOFCs)
Issue Date
201412
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Citation
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, v.39, no.35, pp.20791 - 20798
Abstract
Offering fast oxygen reduction kinetics and high electrical conductivities relative to those of ABO3-type perovskite oxides, layered perovskite cathode materials have received considerable attention for intermediate temperature solid oxide fuel cells (IT-SOFCs). In this study, we have investigated the effects of Ni substitution for the Co site in SmBa0.5Sr0.5Co2O5+δ in terms of structural characteristics, electrical properties, and electrochemical performance of SmBa0.5Sr0.5Co2-xNixO5+δ (x=0, 0.1, and 0.2) in relation to its application as an IT-SOFC cathode material. At the given temperature, the electrical conductivities of SmBa0.5Sr0.5Co2-xNixO5+δ (x=0, 0.1, and 0.2) decrease with increasing Ni content. For x=0.1, the lowest ASR value, 0.125Ωcm2, and the highest single cell performance, 1.78Wcm-2 at 600°C, are obtained.
URI
http://scholarworks.unist.ac.kr/handle/201301/5404
DOI
http://dx.doi.org/10.1016/j.ijhydene.2014.06.136
ISSN
0360-3199
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