Academic Journal
Ionic conductivity and local structural features in Ce1-xSmxO2-x/2
| العنوان: | Ionic conductivity and local structural features in Ce1-xSmxO2-x/2 |
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| المؤلفون: | Presto, S, Artini, C, Pani, M, Carnasciali, M M, Viviani, M, Massardo, S |
| المساهمون: | Presto, S, Artini, C, Pani, M, Carnasciali, M M, Viviani, M, Massardo, S |
| بيانات النشر: | Royal Society of Chemistry GBR |
| سنة النشر: | 2018 |
| المجموعة: | Università degli Studi di Genova: CINECA IRIS |
| مصطلحات موضوعية: | Solid state ionics, doped ceria, ionic conductivity, impedance spectroscopy, x-ray diffraction, Raman spectroscopy |
| الوصف: | Sm-Doped ceria is one of the most promising materials to be used as electrolyte in solid oxide fuel cells due to its remarkable ionic conductivity values in the intermediate temperature range. Transport properties and local structural features of Ce1-xSmxO2-x/2 (0.1 ≤ x ≤ 0.7) were studied by an impedance/μ-Raman spectroscopy coupled approach up to 1073 K. Results suggest that C-based nanosized defect clusters are responsible for the drop in ionic conductivity observed even at x = 0.2, i.e. at a Sm content lower than necessary to allow C domains to reach the percolation threshold through crystallites. Moreover, within the fluorite-type compositional region, with increasing the Sm content, defect clusters undergo a rearrangement resulting in the enlargement of C-based domains rather than in the increase of their number; at higher x, on the contrary, both the size and amount of C domains increase in parallel. |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | STAMPA |
| اللغة: | English |
| Relation: | info:eu-repo/semantics/altIdentifier/pmid/30398485; info:eu-repo/semantics/altIdentifier/wos/WOS:000450660400063; volume:20; firstpage:28338; lastpage:28345; numberofpages:8; journal:PHYSICAL CHEMISTRY CHEMICAL PHYSICS; http://hdl.handle.net/11567/930768 |
| DOI: | 10.1039/c8cp04186e |
| الاتاحة: | http://hdl.handle.net/11567/930768 https://doi.org/10.1039/c8cp04186e |
| Rights: | info:eu-repo/semantics/closedAccess |
| رقم الانضمام: | edsbas.459A618C |
| قاعدة البيانات: | BASE |
| DOI: | 10.1039/c8cp04186e |
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