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

47 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 2000
Externally published	Yes

UN SDGs

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

SDG 7 Affordable and Clean Energy

All Science Journal Classification (ASJC) codes

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

Access to Document

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 - Koyama, Michihisa

AU - Wen, Ching Ju

AU - Yamada, Koichi

PY - 2000/1

Y1 - 2000/1

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AB - 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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