LSCF-CGO nanocomposite cathodes deposited in a single step by spray-pyrolysis
| Autor: | E.R. Losilla, David Marrero-López, J.R. Ramos-Barrado, L. dos Santos-Gómez, J.M. Porras-Vázquez, Francisco Martín |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Nanocomposite Non-blocking I/O Analytical chemistry Sintering 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Microstructure 01 natural sciences Cathode 0104 chemical sciences Dielectric spectroscopy law.invention Grain growth Chemical engineering law Materials Chemistry Ceramics and Composites 0210 nano-technology Polarization (electrochemistry) |
| Zdroj: | Journal of the European Ceramic Society. 38:1647-1653 |
| ISSN: | 0955-2219 |
| DOI: | 10.1016/j.jeurceramsoc.2017.10.010 |
| Popis: | La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3-δ -Ce 0.9 Gd 0.1 O 1.95 (LSCF-CGO) nanostructured cathodes with different LSCF-content are prepared in a single step by spray-pyrolysis deposition, simplifying notably the fabrication process compared to the traditional methods. The phase formation, structure, microstructure and electrochemical properties of the cathodes are investigated as a function of the CGO-content and the temperature by using X-ray diffraction, electron microscopy and impedance spectroscopy. The addition of CGO to LSCF limits the grain growth, giving rise to fine particles of approximately 30 nm of diameter after sintering at 800 °C. A small particle size of 50 nm is retained even after sintering at 1000 °C. However, the polarization resistance, determined by impedance spectroscopy, is not significantly improved with the CGO-addition. The performance of these nanocomposite electrodes, investigated in NiO CGO anode-supported cells, shows an improved power density of 0.9 Wcm −2 at 650 °C, compared to 0.56 Wcm −2 for a conventional screen-printed cathode. |
| Databáze: | OpenAIRE |
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