Electrochemical properties of a SOFC cathode in contact with a chromium-containing alloy separator

Yoshio Matsuzaki; Isamu Yasuda

doi:10.1016/s0167-2738(00)00654-8

Electrochemical properties of a SOFC cathode in contact with a chromium-containing alloy separator

Yoshio Matsuzaki, Isamu Yasuda

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

192 Citations (Scopus)

Abstract

Substrate-type solid oxide fuel cells (SOFCs) can reduce the operating temperature of SOFCs to enable alloys to be used as separators. When chromium-forming alloys are used as the separators, however, the performance of SOFC cathodes degrades rapidly. The degradation of a porous La_0.6Sr_0.4MnO_3+δ (LSM)/YSZ electrode in contact with the alloy current-collector has been investigated using the frequency dispersion diagram of the complex impedance of the electrode. The equivalent circuit analysis based on a Randles-type equivalent circuit made clear that the Cr₂O₃ deposition at the interface between the LSM and the YSZ electrolyte causes an increase in both diffusion and charge-transfer resistances.

Original language	English
Pages (from-to)	271-278
Number of pages	8
Journal	Solid State Ionics
Volume	132
Issue number	3
DOIs	https://doi.org/10.1016/s0167-2738(00)00654-8
Publication status	Published - Jul 2 2000
Externally published	Yes

All Science Journal Classification (ASJC) codes

Chemistry(all)
Materials Science(all)
Condensed Matter Physics

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10.1016/s0167-2738(00)00654-8

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abstract = "Substrate-type solid oxide fuel cells (SOFCs) can reduce the operating temperature of SOFCs to enable alloys to be used as separators. When chromium-forming alloys are used as the separators, however, the performance of SOFC cathodes degrades rapidly. The degradation of a porous La0.6Sr0.4MnO3+δ (LSM)/YSZ electrode in contact with the alloy current-collector has been investigated using the frequency dispersion diagram of the complex impedance of the electrode. The equivalent circuit analysis based on a Randles-type equivalent circuit made clear that the Cr2O3 deposition at the interface between the LSM and the YSZ electrolyte causes an increase in both diffusion and charge-transfer resistances.",

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AU - Yasuda, Isamu

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N2 - Substrate-type solid oxide fuel cells (SOFCs) can reduce the operating temperature of SOFCs to enable alloys to be used as separators. When chromium-forming alloys are used as the separators, however, the performance of SOFC cathodes degrades rapidly. The degradation of a porous La0.6Sr0.4MnO3+δ (LSM)/YSZ electrode in contact with the alloy current-collector has been investigated using the frequency dispersion diagram of the complex impedance of the electrode. The equivalent circuit analysis based on a Randles-type equivalent circuit made clear that the Cr2O3 deposition at the interface between the LSM and the YSZ electrolyte causes an increase in both diffusion and charge-transfer resistances.

AB - Substrate-type solid oxide fuel cells (SOFCs) can reduce the operating temperature of SOFCs to enable alloys to be used as separators. When chromium-forming alloys are used as the separators, however, the performance of SOFC cathodes degrades rapidly. The degradation of a porous La0.6Sr0.4MnO3+δ (LSM)/YSZ electrode in contact with the alloy current-collector has been investigated using the frequency dispersion diagram of the complex impedance of the electrode. The equivalent circuit analysis based on a Randles-type equivalent circuit made clear that the Cr2O3 deposition at the interface between the LSM and the YSZ electrolyte causes an increase in both diffusion and charge-transfer resistances.

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Electrochemical properties of a SOFC cathode in contact with a chromium-containing alloy separator

Abstract

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