Structural, Electrical, and Electrochemical Characteristics of LnBa0.5Sr0.5Co1.5Fe0.5O5+δ (Ln=Pr, Sm, Gd) as Cathode Materials in Intermediate-Temperature Solid Oxide Fuel Cells

Donghwi Jeong, Areum Jun, Young Wan Ju, Junji Hyodo, Jeeyoung Shin, Tatsumi Ishihara, Tak Hyoung Lim, Guntae Kim

Research output: Contribution to journalArticle

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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.

Original languageEnglish
Pages (from-to)1337-1343
Number of pages7
JournalEnergy Technology
Volume5
Issue number8
DOIs
Publication statusPublished - Aug 1 2017

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Solid oxide fuel cells (SOFC)
Cathodes
Oxygen
Electrochemical properties
Temperature
Kinetics
Gadolinium
Cerium compounds
Perovskite
Isotopes
Structural properties
Electric properties
Oxides
Composite materials
Electric Conductivity

All Science Journal Classification (ASJC) codes

  • Energy(all)

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Structural, Electrical, and Electrochemical Characteristics of LnBa0.5Sr0.5Co1.5Fe0.5O5+δ (Ln=Pr, Sm, Gd) as Cathode Materials in Intermediate-Temperature Solid Oxide Fuel Cells. / Jeong, Donghwi; Jun, Areum; Ju, Young Wan; Hyodo, Junji; Shin, Jeeyoung; Ishihara, Tatsumi; Lim, Tak Hyoung; Kim, Guntae.

In: Energy Technology, Vol. 5, No. 8, 01.08.2017, p. 1337-1343.

Research output: Contribution to journalArticle

Jeong, Donghwi ; Jun, Areum ; Ju, Young Wan ; Hyodo, Junji ; Shin, Jeeyoung ; Ishihara, Tatsumi ; Lim, Tak Hyoung ; Kim, Guntae. / Structural, Electrical, and Electrochemical Characteristics of LnBa0.5Sr0.5Co1.5Fe0.5O5+δ (Ln=Pr, Sm, Gd) as Cathode Materials in Intermediate-Temperature Solid Oxide Fuel Cells. In: Energy Technology. 2017 ; Vol. 5, No. 8. pp. 1337-1343.
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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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AU - Jeong, Donghwi

AU - Jun, Areum

AU - Ju, Young Wan

AU - Hyodo, Junji

AU - Shin, Jeeyoung

AU - Ishihara, Tatsumi

AU - Lim, Tak Hyoung

AU - Kim, Guntae

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