La1−xSrxFe0.7Ni0.3O3−δ as both cathode and anode materials for Solid Oxide Fuel Cells
| Autor: | J.R. Ramos-Barrado, J.M. Porras-Vázquez, David Marrero-López, O. Ben Mya, Mahmoud Omari, L. dos Santos-Gómez |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
Renewable Energy Sustainability and the Environment Inorganic chemistry Oxide Energy Engineering and Power Technology 02 engineering and technology Electrolyte 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Microstructure Electrochemistry 01 natural sciences Cathode 0104 chemical sciences law.invention Anode chemistry.chemical_compound Fuel Technology chemistry Chemical engineering law 0210 nano-technology Polarization (electrochemistry) Power density |
| Zdroj: | International Journal of Hydrogen Energy. 42:23160-23169 |
| ISSN: | 0360-3199 |
| DOI: | 10.1016/j.ijhydene.2017.07.150 |
| Popis: | La1−xSrxFe0.7Ni0.3O3−δ (x = 0, 0.1 and 0.2, LSFNx) are investigated as both cathode and anode materials for Solid Oxide Fuel Cells (SOFCs). The structure, microstructure and electrochemical properties of these materials are studied under oxidizing and reducing atmospheres. In air, the electrodes exhibit polarization resistance of 0.1 Ωcm2 at 800 °C under open circuit voltage. In a H2 atmosphere, Ni nanoparticles are exsolved on the surface, leading to a polarization resistance as low as 0.06 Ωcm2. A cell with a 350 μm thick La0.9Sr0.1Ga0.8Mg0.2O3−δ electrolyte and LSFN electrodes generates a power output of 540 mWcm−2 at 800 °C. Moreover, stable values of power density are obtained after successive oxidation/reduction cycles, confirming the reversibility of the electrodes. |
| Databáze: | OpenAIRE |
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