Evaluation of the cathode performance and the distribution of deposited Cr species in the LSCF6428 cathode by Cr poisoning

Do Hyung Cho; Haruo Kishimoto; Katsuhiko Yamaji; Manuel E. Brito; Katherine Develos-Bagarinao; Mina Nishi; Taro Shimonosono; Fangfang Wang; Harumi Yokokawa; Teruhisa Horita

doi:10.1149/05701.1865ecst

Evaluation of the cathode performance and the distribution of deposited Cr species in the LSCF6428 cathode by Cr poisoning

Do Hyung Cho, Haruo Kishimoto, Katsuhiko Yamaji, Manuel E. Brito, Katherine Develos-Bagarinao, Mina Nishi, Taro Shimonosono, Fangfang Wang, Harumi Yokokawa, Teruhisa Horita

Department of System Design Engineering

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

17 Citations (Scopus)

Abstract

The Cr poisoning behavior of LSCF6428 cathode was investigated under Cr-containing vapor conditions at 1073 K using LSCF6428/GDC/Pt cells. When exposed to the Cr-containing vapor, the polarization resistance (low frequency contribution) evaluated from the fitting results of AC impedance measurements of the samples was significantly increased. The sample operated under polarization condition for a longer time (380 h) had higher Cr concentration and lower Sr concentration inside the LSCF cathode, but its resistance was lower compared to the sample operated for a shorter time (75 h) under OCV condition. Microstructural and compositional analysis of the samples operated under polarization condition revealed a significant change in microstructure related to Sr transport. The detailed concentration of Cr and Sr inside the porous LSCF cathode was quantitatively measured by secondary ion mass spectrometer (SIMS), from which the distributions of Cr and Sr inside the porous LSCF cathode after Cr poisoning were derived.

Original language	English
Pages (from-to)	1865-1872
Number of pages	8
Journal	ECS Transactions
Volume	57
Issue number	1
DOIs	https://doi.org/10.1149/05701.1865ecst
Publication status	Published - 2013

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Engineering(all)

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title = "Evaluation of the cathode performance and the distribution of deposited Cr species in the LSCF6428 cathode by Cr poisoning",

abstract = "The Cr poisoning behavior of LSCF6428 cathode was investigated under Cr-containing vapor conditions at 1073 K using LSCF6428/GDC/Pt cells. When exposed to the Cr-containing vapor, the polarization resistance (low frequency contribution) evaluated from the fitting results of AC impedance measurements of the samples was significantly increased. The sample operated under polarization condition for a longer time (380 h) had higher Cr concentration and lower Sr concentration inside the LSCF cathode, but its resistance was lower compared to the sample operated for a shorter time (75 h) under OCV condition. Microstructural and compositional analysis of the samples operated under polarization condition revealed a significant change in microstructure related to Sr transport. The detailed concentration of Cr and Sr inside the porous LSCF cathode was quantitatively measured by secondary ion mass spectrometer (SIMS), from which the distributions of Cr and Sr inside the porous LSCF cathode after Cr poisoning were derived.",

author = "Cho, {Do Hyung} and Haruo Kishimoto and Katsuhiko Yamaji and Brito, {Manuel E.} and Katherine Develos-Bagarinao and Mina Nishi and Taro Shimonosono and Fangfang Wang and Harumi Yokokawa and Teruhisa Horita",

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T1 - Evaluation of the cathode performance and the distribution of deposited Cr species in the LSCF6428 cathode by Cr poisoning

AU - Cho, Do Hyung

AU - Kishimoto, Haruo

AU - Yamaji, Katsuhiko

AU - Brito, Manuel E.

AU - Develos-Bagarinao, Katherine

AU - Nishi, Mina

AU - Shimonosono, Taro

AU - Wang, Fangfang

AU - Yokokawa, Harumi

AU - Horita, Teruhisa

PY - 2013

Y1 - 2013

N2 - The Cr poisoning behavior of LSCF6428 cathode was investigated under Cr-containing vapor conditions at 1073 K using LSCF6428/GDC/Pt cells. When exposed to the Cr-containing vapor, the polarization resistance (low frequency contribution) evaluated from the fitting results of AC impedance measurements of the samples was significantly increased. The sample operated under polarization condition for a longer time (380 h) had higher Cr concentration and lower Sr concentration inside the LSCF cathode, but its resistance was lower compared to the sample operated for a shorter time (75 h) under OCV condition. Microstructural and compositional analysis of the samples operated under polarization condition revealed a significant change in microstructure related to Sr transport. The detailed concentration of Cr and Sr inside the porous LSCF cathode was quantitatively measured by secondary ion mass spectrometer (SIMS), from which the distributions of Cr and Sr inside the porous LSCF cathode after Cr poisoning were derived.

AB - The Cr poisoning behavior of LSCF6428 cathode was investigated under Cr-containing vapor conditions at 1073 K using LSCF6428/GDC/Pt cells. When exposed to the Cr-containing vapor, the polarization resistance (low frequency contribution) evaluated from the fitting results of AC impedance measurements of the samples was significantly increased. The sample operated under polarization condition for a longer time (380 h) had higher Cr concentration and lower Sr concentration inside the LSCF cathode, but its resistance was lower compared to the sample operated for a shorter time (75 h) under OCV condition. Microstructural and compositional analysis of the samples operated under polarization condition revealed a significant change in microstructure related to Sr transport. The detailed concentration of Cr and Sr inside the porous LSCF cathode was quantitatively measured by secondary ion mass spectrometer (SIMS), from which the distributions of Cr and Sr inside the porous LSCF cathode after Cr poisoning were derived.

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Evaluation of the cathode performance and the distribution of deposited Cr species in the LSCF6428 cathode by Cr poisoning

Abstract

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