La1−xSrxFe0.7Ni0.3O3−δ as both cathode and anode materials for Solid Oxide Fuel Cells
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 exh...
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| Published in: | International journal of hydrogen energy Vol. 42; no. 36; pp. 23160 - 23169 |
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| Main Authors: | , , , , , |
| Format: | Journal Article |
| Language: | English |
| Published: |
Elsevier Ltd
07-09-2017
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| Subjects: | |
| Online Access: | Get full text |
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| Summary: | 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.
•La1−xSrxFe0.7Ni0.3O3−δ (LSFN) as symmetrical electrodes for SOFCs.•LSFN exhibits polarization resistance of 0.1 Ωcm2 in air and 0.06 Ωcm2 in 100% H2 at 800 °C.•A power density of 540 mWcm−2 is achieved at 800 °C.•LSFN electrodes show long term stability upon reduction-oxidation cycles. |
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| ISSN: | 0360-3199 1879-3487 |
| DOI: | 10.1016/j.ijhydene.2017.07.150 |