Preparation and characterization of La1.75Y0.25Mo2-xAlxO9-δ as solid electrolyte for intermediate temperatures SOFC
| العنوان: | Preparation and characterization of La1.75Y0.25Mo2-xAlxO9-δ as solid electrolyte for intermediate temperatures SOFC |
|---|---|
| المؤلفون: | Changan Tian, Minzheng Zhu, Lingbo Shao, Xiaoling Qu, Lejie Zhu, Chao Chen, Cao Wang, Yang Liu |
| المصدر: | Processing and Application of Ceramics. 17:31-38 |
| بيانات النشر: | National Library of Serbia, 2023. |
| سنة النشر: | 2023 |
| مصطلحات موضوعية: | Ceramics and Composites |
| الوصف: | Yttrium and aluminium co-substitutions on lanthanum molybdate ceramics with the nominal formula La1.75Y0.25Mo2-xAlxO9-?? (LYMA, x = 0, 0.1, 0.2, 0.3 and 0.4) were synthesized by citric acid-nitrate combustion method and used for preparation of solid electrolyte for intermediate-temperature solid oxide fuel cells (ITSOFCs). Phase composition, structure, conductivity and electrical properties of LYMA have been investigated as a function of aluminium content by X-ray diffraction, scanning electron microscopy and electrochemical impedance spectroscopy, respectively. Experimental results showed that the substitution of La and Mo with appropriate amounts of Y and Al can effectively stabilize the ?-form of La2Mo2O9 at room temperature and inhibit its phase transition to ?-form. The LYMA synthesized by combustion method exhibited a better sinterability where relative density of the samples sintered at 950?C for 4 h was higher than 95%TD. The performance of the LYMA electrolyte was found to be related to Al-content. The La1.75Y0.25Mo1.8Al0.2O8.7 exhibited high oxide ion conductivity (?= 42mS/cm at 800?C) and low electrical activation energy (Ea = 1.18 eV). These preliminary results indicate that the LYMA is a promising electrolyte for IT-SOFCs. |
| تدمد: | 2406-1034 1820-6131 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::5ee24f6fefe6a8eb79b8d5877b9826e5 https://doi.org/10.2298/pac2301031t |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi...........5ee24f6fefe6a8eb79b8d5877b9826e5 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 24061034 18206131 |
|---|