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Electrolyte materials for solid oxide fuel cells derived from metal complexes: Gadolinia-doped ceria |
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| Authors: | Chatchai Veranitisagul Attaphon Kaewvilai Worawat Wattanathana Nattamon Koonsaeng Enrico Traversa Apirat Laobuthee |
| Affiliation: | 1. Department of Chemical Science and Technology, University of Rome “Tor Vergata”, Rome 00133, Italy;2. Department of Materials and Metallurgical Engineering, Faculty of Engineering, Rajamangala University of Technology Thanyaburi, Thanyaburi, Pathumthani 12110, Thailand;3. Department of Materials Engineering, Faculty of Engineering, Kasetsart University, Chatuchak, Bangkok 10900, Thailand;4. Center of Advanced Studies in Industrial Technology, Faculty of Engineering, Kasetsart University, Chatuchak, Bangkok 10900, Thailand;5. Department of Chemistry, Faculty of Science, Kasetsart University, Chatuchak, Bangkok 10900, Thailand;6. International Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), Tsukuba, Ibaraki 305-0044, Japan |
| Abstract: | Gadolinia doped ceria (GDC) powders with different gadolinium contents were successfully prepared by the thermal decomposition of ceria complexes. All the calcined powder samples were found to be ceria-based solid-solutions having a fluorite-type structure. The powders were cold-isostatically pressed and sintered in air at 1500 °C for 5 h to attain a sintered density of about 90% of its theoretical value. The electrical conductivity of the GDC pellets in air was studied as a function of temperature in the 225–700 °C range, by using two-probe electrochemical impedance spectroscopy measurements. The highest total conductivity (σ600 °C = 0.025 S/cm) was found for the Ce0.85Gd0.15O1.925 composition. |
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