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

Research output: Contribution to journalArticle

29 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)520-525
Number of pages6
JournalFuel Cells
Volume13
Issue number4
DOIs
Publication statusPublished - 2013 Aug
Externally publishedYes

Fingerprint

Sulfur dioxide
Cathodes
Degradation
Adsorption
Cathodic polarization
Gas mixtures
Vacancies
Sulfur
Flow rate
Oxides
Ions
Air

Keywords

  • Cathode
  • LSCF
  • Solid Oxide Fuel Cells (SOFCs)
  • Sulfur Poisoning

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology

Cite this

Wang, F., Yamaji, K., Cho, D. H., Shimonosono, T., Nishi, M., Kishimoto, H., ... Yokokawa, H. (2013). Evaluation of sulfur dioxide poisoning for LSCF cathodes. Fuel Cells, 13(4), 520-525. https://doi.org/10.1002/fuce.201200172

Evaluation of sulfur dioxide poisoning for LSCF cathodes. / Wang, F.; Yamaji, K.; Cho, D. H.; Shimonosono, T.; Nishi, M.; Kishimoto, H.; Brito, M. E.; Horita, T.; Yokokawa, H.

In: Fuel Cells, Vol. 13, No. 4, 08.2013, p. 520-525.

Research output: Contribution to journalArticle

Wang, F, Yamaji, K, Cho, DH, Shimonosono, T, Nishi, M, Kishimoto, H, Brito, ME, Horita, T & Yokokawa, H 2013, 'Evaluation of sulfur dioxide poisoning for LSCF cathodes', Fuel Cells, vol. 13, no. 4, pp. 520-525. https://doi.org/10.1002/fuce.201200172
Wang F, Yamaji K, Cho DH, Shimonosono T, Nishi M, Kishimoto H et al. Evaluation of sulfur dioxide poisoning for LSCF cathodes. Fuel Cells. 2013 Aug;13(4):520-525. https://doi.org/10.1002/fuce.201200172
Wang, F. ; Yamaji, K. ; Cho, D. H. ; Shimonosono, T. ; Nishi, M. ; Kishimoto, H. ; Brito, M. E. ; Horita, T. ; Yokokawa, H. / Evaluation of sulfur dioxide poisoning for LSCF cathodes. In: Fuel Cells. 2013 ; Vol. 13, No. 4. pp. 520-525.
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