Structural, Electrical, and Electrochemical Characteristics of LnBa(0.5)Sr(0.5)Co(1.5)Fe(0.5)O(5+delta) (Ln=Pr, Sm, Gd) as Cathode Materials in Intermediate-Temperature Solid Oxide Fuel Cells
- Author(s)
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Jeong, Donghwi, Jun, Areum, Ju, Young-Wan, Hyodo. Junji, Shin, Jeeyoung, Ishihara, Tatsumi, Lim, Tak-Hyoung, Kim, Guntae
- Issued Date
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2017-08
- DOI
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10.1002/ente.201600618
- URI
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https://scholarworks.unist.ac.kr/handle/201301/23164
- Fulltext
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http://onlinelibrary.wiley.com/doi/10.1002/ente.201600618/abstract
- Citation
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ENERGY TECHNOLOGY, v.5, no.8, pp.1337 - 1343
- Abstract
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Layered perovskite oxides have received great attention as prospective cathode materials for intermediate-temperature solid oxide fuel cells (IT-SOFCs) because of their high electrical conductivities and fast oxygen kinetics. Herein, we focus on the structural, electrical, and electrochemical properties of layered perovskites LnBa0.5Sr0.5Co1.5Fe0.5O5+δ (LnBSCF, Ln=Pr, Sm, and Gd) as a cathode material for IT-SOFCs. Among the evaluated perovskites, PrBa0.5Sr0.5Co1.5Fe0.5O5+δ (PBSCF) showed the highest electrical conductivity, the highest oxygen content, and the highest values of the oxygen bulk diffusion coefficient (D*) and surface exchange coefficient (k) measured by using isotope oxygen exchange. The composite cathode of PBSCF and gadolinium-doped ceria is the most suitable cathode material for IT-SOFCs among the materials investigated because of its excellent electrochemical properties and fast oxygen kinetics.
- Publisher
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WILEY-V C H VERLAG GMBH
- ISSN
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2194-4288
- Keyword (Author)
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Cathodes, Electrochemistry, Lanthanides, Perovskites, Solid oxide fuel cells
- Keyword
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LAYERED PEROVSKITE CATHODES, EXCHANGE KINETICS, OXYGEN REDUCTION, ELECTRODES, SOFC, HYDROCARBONS, TECHNOLOGY, DIFFUSION, CATALYSTS, EFFICIENT
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