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Author

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

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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

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Title
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
Jeong, DonghwiJun, AreumJu, Young-WanHyodo. JunjiShin, JeeyoungIshihara, TatsumiLim, Tak-HyoungKim, Guntae
Issue Date
201708
Publisher
WILEY-V C H VERLAG GMBH
Citation
ENERGY TECHNOLOGY, v.5, no.8, pp.1337 - 1343
Abstract
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.
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DOI
http://dx.doi.org/10.1002/ente.201600618
ISSN
2194-4288
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