Evaluation of sulfur dioxide poisoning for LSCF cathodes

F. Wang; K. Yamaji; D. H. Cho; T. Shimonosono; M. Nishi; H. Kishimoto; M. E. Brito; T. Horita; H. Yokokawa

doi:10.1002/fuce.201200172

Evaluation of sulfur dioxide poisoning for LSCF cathodes

F. Wang, K. Yamaji, D. H. Cho, T. Shimonosono, M. Nishi, H. Kishimoto, M. E. Brito, T. Horita, H. Yokokawa

研究成果: Article › 査読

45 被引用数 (Scopus)

抄録

Sulfur poisoning behavior of La_0.6Sr_0.4Co _0.2Fe_0.8O_3-δ (LSCF6428) cathode was investigated at T = 1073 K (800°C) under 0.1 ppm of SO₂-air mixture gas; the amount of supplied SO₂ was controlled by changing the flow rate. Two stages of the performance degradation were found: a rapid degradation at the early stage and a subsequent monotonic degradation. The elemental distributions of SrSO₄ showed a strong correlation between the electrochemically active sites and SrSO₄ reaction sites in the vicinity of the LSCF6428/10GDC interfaces. Considerations were made to attribute the first and the second stages of performance degradation to the SO ₂ adsorption and the SrSO₄ formation, respectively. The SO₂ adsorption mechanism was discussed in terms of the high concentration of oxide ion vacancies in the electrochemically active region under the cathodic polarization condition.

本文言語	English
ページ（範囲）	520-525
ページ数	6
ジャーナル	Fuel Cells
巻	13
号	4
DOI	https://doi.org/10.1002/fuce.201200172
出版ステータス	Published - 2013 8月
外部発表	はい

ASJC Scopus subject areas

再生可能エネルギー、持続可能性、環境
エネルギー工学および電力技術

UN SDG

この成果は、次の持続可能な開発目標に貢献しています

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10.1002/fuce.201200172

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@article{d5888e6ceb404fef9e00b6ede48b7208,

title = "Evaluation of sulfur dioxide poisoning for LSCF cathodes",

abstract = "Sulfur poisoning behavior of La0.6Sr0.4Co 0.2Fe0.8O3-δ (LSCF6428) cathode was investigated at T = 1073 K (800°C) under 0.1 ppm of SO2-air mixture gas; the amount of supplied SO2 was controlled by changing the flow rate. Two stages of the performance degradation were found: a rapid degradation at the early stage and a subsequent monotonic degradation. The elemental distributions of SrSO4 showed a strong correlation between the electrochemically active sites and SrSO4 reaction sites in the vicinity of the LSCF6428/10GDC interfaces. Considerations were made to attribute the first and the second stages of performance degradation to the SO 2 adsorption and the SrSO4 formation, respectively. The SO2 adsorption mechanism was discussed in terms of the high concentration of oxide ion vacancies in the electrochemically active region under the cathodic polarization condition.",

keywords = "Cathode, LSCF, Solid Oxide Fuel Cells (SOFCs), Sulfur Poisoning",

author = "F. Wang and K. Yamaji and Cho, {D. H.} and T. Shimonosono and M. Nishi and H. Kishimoto and Brito, {M. E.} and T. Horita and H. Yokokawa",

year = "2013",

month = aug,

doi = "10.1002/fuce.201200172",

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AU - Wang, F.

AU - Yamaji, K.

AU - Cho, D. H.

AU - Shimonosono, T.

AU - Nishi, M.

AU - Kishimoto, H.

AU - Brito, M. E.

AU - Horita, T.

AU - Yokokawa, H.

PY - 2013/8

Y1 - 2013/8

N2 - Sulfur poisoning behavior of La0.6Sr0.4Co 0.2Fe0.8O3-δ (LSCF6428) cathode was investigated at T = 1073 K (800°C) under 0.1 ppm of SO2-air mixture gas; the amount of supplied SO2 was controlled by changing the flow rate. Two stages of the performance degradation were found: a rapid degradation at the early stage and a subsequent monotonic degradation. The elemental distributions of SrSO4 showed a strong correlation between the electrochemically active sites and SrSO4 reaction sites in the vicinity of the LSCF6428/10GDC interfaces. Considerations were made to attribute the first and the second stages of performance degradation to the SO 2 adsorption and the SrSO4 formation, respectively. The SO2 adsorption mechanism was discussed in terms of the high concentration of oxide ion vacancies in the electrochemically active region under the cathodic polarization condition.

AB - Sulfur poisoning behavior of La0.6Sr0.4Co 0.2Fe0.8O3-δ (LSCF6428) cathode was investigated at T = 1073 K (800°C) under 0.1 ppm of SO2-air mixture gas; the amount of supplied SO2 was controlled by changing the flow rate. Two stages of the performance degradation were found: a rapid degradation at the early stage and a subsequent monotonic degradation. The elemental distributions of SrSO4 showed a strong correlation between the electrochemically active sites and SrSO4 reaction sites in the vicinity of the LSCF6428/10GDC interfaces. Considerations were made to attribute the first and the second stages of performance degradation to the SO 2 adsorption and the SrSO4 formation, respectively. The SO2 adsorption mechanism was discussed in terms of the high concentration of oxide ion vacancies in the electrochemically active region under the cathodic polarization condition.

KW - Cathode

KW - LSCF

KW - Solid Oxide Fuel Cells (SOFCs)

KW - Sulfur Poisoning

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DO - 10.1002/fuce.201200172

M3 - Article

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SN - 1615-6846

VL - 13

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JO - Fuel Cells

JF - Fuel Cells

IS - 4

ER -

Evaluation of sulfur dioxide poisoning for LSCF cathodes

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ASJC Scopus subject areas

UN SDG

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