Changes in properties of scandia-stabilised ceria-doped zirconia ceramics caused by silver migration in the electric field
Rattachement africain : pl, lt. Niveau de preuve : code pays fourni par la source.
Le résumé fourni par la source
Silver is one of the most promising cathode materials for low temperature (300–500 °C) solid oxide fuel cells. The most important disadvantage of silver is its migration in the electric field. For better understanding of this phenomenon, an in situ observation of the migration mechanism was undertaken with the use of high-temperature microscopes. Scandia stabilised ceria doped zirconia CeScSZ electrolyte prepared from commercial powder was examined before and after silver migration experiments using scanning electron microscope. X-ray diffraction, broadband electrochemical impedance spectroscopy, and X-ray photoelectron spectroscopy. The silver electrodes for solid oxide fuel cells were prepared using magnetron sputtering. The described cells under polarisation were examined using a high-temperature low energy electron microscope. Reference cells and post-mortem cells were observed using a scanning electron microscope equipped with high temperature stage. Under polarisation, silver moved inside the electrolyte and along the surface towards the region between electrodes. The structures thus formed were similar to those previously described in the literature; however, direct observation of the deposit growth was unsuccessful. In situ scanning electron microscopy observations of the silver electrode at 650 °C revealed neither melting of the smallest silver particles nor movement of silver structures. Silver migration through the electrolyte caused a reduction in grain interior conductivity of the electrolyte, whereas its grain boundary conductivity remained unaffected.
Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.
Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.
- Titre Crossref
- Changes in properties of scandia-stabilised ceria-doped zirconia ceramics caused by silver migration in the electric field
- Date Crossref
- 01/04/2020
- Éditeur
- Elsevier BV
- Type
- journal-article
Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.
Où se fait cette recherche
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Jerzy Haber Institute of Catalysis and Surface Chemistry pays non établi dans la noticeStructure de recherche
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Vilnius University pays non établi dans la noticeUniversité ou école supérieure
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AGH University of Krakow pays non établi dans la noticeUniversité ou école supérieure
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Institute of Metallurgy and Materials Science pays non établi dans la noticeStructure de recherche
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Polish Academy of Sciences pays non établi dans la noticeOrganisme public
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Faculty of Physics Institute of Applied Electrodynamics and Telecommunications pays non établi dans la noticeUniversité ou école supérieure
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AGH–University of Science and Technology pays non établi dans la noticeUniversité ou école supérieure
Jerzy Haber Institute of Catalysis and Surface Chemistry, Vilnius University et AGH University of Krakow, avec 4 autres affiliations.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.