Thin film nanocrystalline Ba0.5Sr0.5Co0.8Fe0.2O3: Synthesis, conductivity, and micro-solid oxide fuel cells
| Autor: | Bo-Kuai Lai, Shriram Ramanathan, Kian Kerman |
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| Rok vydání: | 2011 |
| Předmět: |
Materials science
Renewable Energy Sustainability and the Environment Oxide Energy Engineering and Power Technology Mineralogy Equivalent oxide thickness Conductivity Microstructure Nanocrystalline material Cathode law.invention chemistry.chemical_compound Chemical engineering chemistry law Crystallite Electrical and Electronic Engineering Physical and Theoretical Chemistry Thin film |
| Zdroj: | Journal of Power Sources. 196:6214-6218 |
| ISSN: | 0378-7753 |
| DOI: | 10.1016/j.jpowsour.2011.03.049 |
| Popis: | We report on single phase polycrystalline Ba0.5Sr0.5Co0.8Fe0.2O3 thin films grown on (1 0 0) (Y2O3)0.08(ZrO2)0.92 substrates by radio frequency sputtering. Detailed studies on electrical conductivity as a function of temperature up to 500 °C are carried out for films in the 20–100 nm thickness range. Free-standing thin film micro-solid oxide fuel cells utilizing nanostructured Ba0.5Sr0.5Co0.8Fe0.2O3 cathodes are fabricated and tested for the first time. A maximum power density of 35 mW cm−2 at 520 °C was obtained with Ba0.5Sr0.5Co0.8Fe0.2O3/(Y2O3)0.08(ZrO2)0.92/Pt micro-solid oxide fuel cells. These results indicate the significance of microstructure on electrical properties of Ba0.5Sr0.5Co0.8Fe0.2O3 and present the first successful thin film micro-solid oxide fuel cells integrating Ba0.5Sr0.5Co0.8Fe0.2O3. We anticipate these results to be of relevance in advancing micro-solid oxide fuel cells for reduced temperature operation with dense oxide cathodes. |
| Databáze: | OpenAIRE |
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