La0.6Ba0.4CoO3 as a cathode material for solid oxide fuel cells using a BaCeO3 electrolyte

Michihisa Koyama; Ching Ju Wen; Koichi Yamada

doi:10.1149/1.1393160

La_0.6Ba_0.4CoO₃ as a cathode material for solid oxide fuel cells using a BaCeO₃ electrolyte

Michihisa Koyama, Ching Ju Wen, Koichi Yamada

Research output: Contribution to journal › Article › peer-review

46 Citations (Scopus)

Abstract

The cathodic reaction mechanism of a solid oxide fuel cell (SOFC) was investigated for an electrode-electrolyte system of La_0.6Ba_0.4CoO₃ (LBC)-BaCeO₃, under both the O^2- conducting and H⁺/O^2- mixed-ionic conducting conditions. AC impedance measurements were carried out, and the electrode interfacial conductivities were calculated. The experimental results revealed that the processes dominating the electrode resistance for the O^2- conducting and the H⁺/O^2- mixed-ionic conducting conditions are different. It was also found that the process dominating the electrode resistance changes at 700 °C under H⁺/O^2- mixed-ionic conducting conditions. The process dominating the electrode resistance above 700 °C is postulated to be the reaction O_LBC+H_LBC→OH_LBC. LBC showed high-performance cathode characteristics for a SOFC using BaCeO₃ electrolyte.

Original language	English
Pages (from-to)	87-91
Number of pages	5
Journal	Journal of the Electrochemical Society
Volume	147
Issue number	1
DOIs	https://doi.org/10.1149/1.1393160
Publication status	Published - Jan 1 2000

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Renewable Energy, Sustainability and the Environment
Surfaces, Coatings and Films
Electrochemistry
Materials Chemistry

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This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1149/1.1393160

Cite this

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title = "La0.6Ba0.4CoO3 as a cathode material for solid oxide fuel cells using a BaCeO3 electrolyte",

abstract = "The cathodic reaction mechanism of a solid oxide fuel cell (SOFC) was investigated for an electrode-electrolyte system of La0.6Ba0.4CoO3 (LBC)-BaCeO3, under both the O2- conducting and H+/O2- mixed-ionic conducting conditions. AC impedance measurements were carried out, and the electrode interfacial conductivities were calculated. The experimental results revealed that the processes dominating the electrode resistance for the O2- conducting and the H+/O2- mixed-ionic conducting conditions are different. It was also found that the process dominating the electrode resistance changes at 700 °C under H+/O2- mixed-ionic conducting conditions. The process dominating the electrode resistance above 700 °C is postulated to be the reaction OLBC+HLBC→OHLBC. LBC showed high-performance cathode characteristics for a SOFC using BaCeO3 electrolyte.",

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AU - Wen, Ching Ju

AU - Yamada, Koichi

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N2 - The cathodic reaction mechanism of a solid oxide fuel cell (SOFC) was investigated for an electrode-electrolyte system of La0.6Ba0.4CoO3 (LBC)-BaCeO3, under both the O2- conducting and H+/O2- mixed-ionic conducting conditions. AC impedance measurements were carried out, and the electrode interfacial conductivities were calculated. The experimental results revealed that the processes dominating the electrode resistance for the O2- conducting and the H+/O2- mixed-ionic conducting conditions are different. It was also found that the process dominating the electrode resistance changes at 700 °C under H+/O2- mixed-ionic conducting conditions. The process dominating the electrode resistance above 700 °C is postulated to be the reaction OLBC+HLBC→OHLBC. LBC showed high-performance cathode characteristics for a SOFC using BaCeO3 electrolyte.

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