Chemical expansion in SOFC materials: Ramifications, origins, and mitigation

S. R. Bishop, D. Marrocchelli, Nicola Helen Perry, H. L. Tuller, G. Watson, B. Yildiz, K. Amezawa, J. Kilner

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Non-stoichiometric oxides are frequently used in SOFC electrodes due to the ease with which they exchange oxygen with the atmosphere over their entire surface, as compared to composites limited to three phase boundaries (i.e. LSM/YSZ). The large fluctuations in oxygen content these materials exhibit during operation lead, not only to significant changes in transport properties, but also to a defect induced expansion, known as chemical expansion, potentially contributing to mechanical failure. In this presentation, new insights into the origins of chemical expansion, with consequent development of methods for reducing its impact in non-stoichiometric oxides, facilitated by collaborations of the authors, will be discussed.

Original languageEnglish
Pages (from-to)643-648
Number of pages6
JournalECS Transactions
Volume57
Issue number1
DOIs
Publication statusPublished - Jan 1 2013

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Solid oxide fuel cells (SOFC)
Oxides
Oxygen
Phase boundaries
Transport properties
Lead
Defects
Electrodes
Composite materials

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

Bishop, S. R., Marrocchelli, D., Perry, N. H., Tuller, H. L., Watson, G., Yildiz, B., ... Kilner, J. (2013). Chemical expansion in SOFC materials: Ramifications, origins, and mitigation. ECS Transactions, 57(1), 643-648. https://doi.org/10.1149/05701.0643ecst

Chemical expansion in SOFC materials : Ramifications, origins, and mitigation. / Bishop, S. R.; Marrocchelli, D.; Perry, Nicola Helen; Tuller, H. L.; Watson, G.; Yildiz, B.; Amezawa, K.; Kilner, J.

In: ECS Transactions, Vol. 57, No. 1, 01.01.2013, p. 643-648.

Research output: Contribution to journalArticle

Bishop, SR, Marrocchelli, D, Perry, NH, Tuller, HL, Watson, G, Yildiz, B, Amezawa, K & Kilner, J 2013, 'Chemical expansion in SOFC materials: Ramifications, origins, and mitigation', ECS Transactions, vol. 57, no. 1, pp. 643-648. https://doi.org/10.1149/05701.0643ecst
Bishop SR, Marrocchelli D, Perry NH, Tuller HL, Watson G, Yildiz B et al. Chemical expansion in SOFC materials: Ramifications, origins, and mitigation. ECS Transactions. 2013 Jan 1;57(1):643-648. https://doi.org/10.1149/05701.0643ecst
Bishop, S. R. ; Marrocchelli, D. ; Perry, Nicola Helen ; Tuller, H. L. ; Watson, G. ; Yildiz, B. ; Amezawa, K. ; Kilner, J. / Chemical expansion in SOFC materials : Ramifications, origins, and mitigation. In: ECS Transactions. 2013 ; Vol. 57, No. 1. pp. 643-648.
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