Journal article
In situ observations of microstructural changes in SOFC anodes during redox cycling
The anode-supported solid oxide fuel cell (SOFC) degrades when the anode is subjected to redox cycling. The degradation has qualitatively been related to microstructural changes in the nickel-yttria stabilized zirconia anode of the tested cells. In this work, the microstructural changes were observed in situ using environmental scanning electron microscopy.
In the reduced state, a dynamic rounding of the nickel particles occurred. The oxide growth upon re-oxidation depended on the oxidation kinetics. During rapid oxidation, the NiO particles divided into 2-4 particles, which grew into the surrounding voids. For slower oxidation, an external oxide layer was seen to develop around the individual particles. (c) 2006 The Electrochemical Society.
Language: | English |
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Publisher: | The Electrochemical Society |
Year: | 2006 |
Pages: | A403 |
ISSN: | 19448775 , 10990062 , 21628734 and 21628726 |
Types: | Journal article |
DOI: | 10.1149/1.2214303 |
ORCIDs: | Mogensen, Mogens Bjerg |