Degradation Mechanisms of La–Sr–Co–Fe–O[sub 3] SOFC Cathodes
| Autor: | S. P. Simner, M. D. Anderson, M. H. Engelhard, J. W. Stevenson |
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| Rok vydání: | 2006 |
| Předmět: |
Materials science
Scanning electron microscope General Chemical Engineering Analytical chemistry Electrolyte Cathode law.invention Direct energy conversion X-ray photoelectron spectroscopy law Electrochemistry Degradation (geology) General Materials Science Electrical and Electronic Engineering Physical and Theoretical Chemistry Spectroscopy Yttria-stabilized zirconia |
| Zdroj: | Electrochemical and Solid-State Letters. 9:A478 |
| ISSN: | 1099-0062 |
| DOI: | 10.1149/1.2266160 |
| Popis: | The long-term stability of anode-supported YSZ electrolyte SOFCs utilizing (La0.6Sr0.4)0.98Co0.2Fe0.8O3-? (LSCF-6428) cathodes was assessed. Samples tested for 500 hours at 750 C and 0.7V indicated ?50% degradation. While scanning electron microscopy (SEM) and energy dispersive x-ray (EDX) analysis indicated no obvious microstructural or chemical phenomena that could explain the high degradation, x-ray photon spectroscopy (XPS) revealed that enrichment of Sr at the cathode-electrolyte and cathode-current collector interfaces was at least partially responsible for the observed degradation. |
| Databáze: | OpenAIRE |
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