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 language | English |
|---|---|
| Pages (from-to) | 643-648 |
| Number of pages | 6 |
| Journal | ECS Transactions |
| Volume | 57 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - Jan 1 2013 |
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All Science Journal Classification (ASJC) codes
- Engineering(all)
Cite this
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 journal › Article
}
TY - JOUR
T1 - Chemical expansion in SOFC materials
T2 - Ramifications, origins, and mitigation
AU - Bishop, S. R.
AU - Marrocchelli, D.
AU - Perry, Nicola Helen
AU - Tuller, H. L.
AU - Watson, G.
AU - Yildiz, B.
AU - Amezawa, K.
AU - Kilner, J.
PY - 2013/1/1
Y1 - 2013/1/1
N2 - 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.
AB - 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.
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UR - http://www.scopus.com/inward/citedby.url?scp=84905061060&partnerID=8YFLogxK
U2 - 10.1149/05701.0643ecst
DO - 10.1149/05701.0643ecst
M3 - Article
VL - 57
SP - 643
EP - 648
JO - ECS Transactions
JF - ECS Transactions
SN - 1938-5862
IS - 1
ER -