Cr deposition on porous La0.6Sr0.4Co0.2Fe0.8O3 − δ electrodes of solid oxide cells under open circuit condition
The effect of Cr deposition and poisoning on the electrochemical activity and microstructure of La0.6Sr0.4Co0.2Fe0.8O3 − δ (LSCF) electrodes is investigated in detail under open circuit conditions at 900 °C, 800 °C and 700 °C in the presence of a Fe–Cr alloy interconnect. The electrochemical perform...
| Main Authors: | , , , , |
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| Format: | Journal Article |
| Published: |
2015
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| Online Access: | http://hdl.handle.net/20.500.11937/44305 |
| _version_ | 1848756962797289472 |
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| author | Wei, B. Chen, K. Wang, C. Lü, Z. Jiang, San Ping |
| author_facet | Wei, B. Chen, K. Wang, C. Lü, Z. Jiang, San Ping |
| author_sort | Wei, B. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | The effect of Cr deposition and poisoning on the electrochemical activity and microstructure of La0.6Sr0.4Co0.2Fe0.8O3 − δ (LSCF) electrodes is investigated in detail under open circuit conditions at 900 °C, 800 °C and 700 °C in the presence of a Fe–Cr alloy interconnect. The electrochemical performance of LSCF electrodes for the O2 reduction reaction (ORR) under solid oxide fuel cells (SOFCs) mode and for the O2 evolution reaction (OER) under solid oxide electrolysis cells (SOECs) mode is seriously degraded after exposure to Cr-containing air at open circuit voltage. SEM, XRD and Raman spectroscopy analyses reveal the formation of SrCrO4 phase and the deposition of a ~ 1 μm thick Cr deposit layer on the outer surface of LSCF electrodes after exposure to Fe–Cr alloy interconnect at 900 °C for 20 h under open circuit conditions, greatly limiting the oxygen exchange and diffusion related processes. However, the magnitude of Cr deposition decreases significantly with the decrease in temperature. The results also confirm that the mechanism of Cr deposition on LSCF electrodes is a chemical process in nature that is initiated most likely by the nucleation reaction between surface segregated SrOx and gaseous Cr species. |
| first_indexed | 2025-11-14T09:20:32Z |
| format | Journal Article |
| id | curtin-20.500.11937-44305 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T09:20:32Z |
| publishDate | 2015 |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-443052017-09-13T14:29:23Z Cr deposition on porous La0.6Sr0.4Co0.2Fe0.8O3 − δ electrodes of solid oxide cells under open circuit condition Wei, B. Chen, K. Wang, C. Lü, Z. Jiang, San Ping The effect of Cr deposition and poisoning on the electrochemical activity and microstructure of La0.6Sr0.4Co0.2Fe0.8O3 − δ (LSCF) electrodes is investigated in detail under open circuit conditions at 900 °C, 800 °C and 700 °C in the presence of a Fe–Cr alloy interconnect. The electrochemical performance of LSCF electrodes for the O2 reduction reaction (ORR) under solid oxide fuel cells (SOFCs) mode and for the O2 evolution reaction (OER) under solid oxide electrolysis cells (SOECs) mode is seriously degraded after exposure to Cr-containing air at open circuit voltage. SEM, XRD and Raman spectroscopy analyses reveal the formation of SrCrO4 phase and the deposition of a ~ 1 μm thick Cr deposit layer on the outer surface of LSCF electrodes after exposure to Fe–Cr alloy interconnect at 900 °C for 20 h under open circuit conditions, greatly limiting the oxygen exchange and diffusion related processes. However, the magnitude of Cr deposition decreases significantly with the decrease in temperature. The results also confirm that the mechanism of Cr deposition on LSCF electrodes is a chemical process in nature that is initiated most likely by the nucleation reaction between surface segregated SrOx and gaseous Cr species. 2015 Journal Article http://hdl.handle.net/20.500.11937/44305 10.1016/j.ssi.2015.08.018 restricted |
| spellingShingle | Wei, B. Chen, K. Wang, C. Lü, Z. Jiang, San Ping Cr deposition on porous La0.6Sr0.4Co0.2Fe0.8O3 − δ electrodes of solid oxide cells under open circuit condition |
| title | Cr deposition on porous La0.6Sr0.4Co0.2Fe0.8O3 − δ electrodes of solid oxide cells under open circuit condition |
| title_full | Cr deposition on porous La0.6Sr0.4Co0.2Fe0.8O3 − δ electrodes of solid oxide cells under open circuit condition |
| title_fullStr | Cr deposition on porous La0.6Sr0.4Co0.2Fe0.8O3 − δ electrodes of solid oxide cells under open circuit condition |
| title_full_unstemmed | Cr deposition on porous La0.6Sr0.4Co0.2Fe0.8O3 − δ electrodes of solid oxide cells under open circuit condition |
| title_short | Cr deposition on porous La0.6Sr0.4Co0.2Fe0.8O3 − δ electrodes of solid oxide cells under open circuit condition |
| title_sort | cr deposition on porous la0.6sr0.4co0.2fe0.8o3 − δ electrodes of solid oxide cells under open circuit condition |
| url | http://hdl.handle.net/20.500.11937/44305 |