A stability study of impregnated LSCF–GDC composite cathodes of solid oxide fuel cells
The performance degradation of composite cathodes of La0.6Sr0.4Co0.2Fe0.8O3−δ and Gd-doped ceria (LSCF–GDC), prepared by impregnating the porous GDC scaffold with a nitrate solution containing La, Sr, Co and Fe in desired composition, is investigated at 750 °C and open circuit in air for 500 h. The...
| Main Authors: | , , , , , |
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| Format: | Journal Article |
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Elsevier B.V.
2013
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| Online Access: | http://hdl.handle.net/20.500.11937/6882 |
| _version_ | 1848745205408202752 |
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| author | Liu, Y. Wang, F. Chi, B. Pu, J. Jian, L. Jiang, San Ping |
| author_facet | Liu, Y. Wang, F. Chi, B. Pu, J. Jian, L. Jiang, San Ping |
| author_sort | Liu, Y. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | The performance degradation of composite cathodes of La0.6Sr0.4Co0.2Fe0.8O3−δ and Gd-doped ceria (LSCF–GDC), prepared by impregnating the porous GDC scaffold with a nitrate solution containing La, Sr, Co and Fe in desired composition, is investigated at 750 °C and open circuit in air for 500 h. The performance of the impregnated LSCF–GDC composite cathodes deteriorates after testing at 750 °C for 500 h; the electrode polarization resistance (Rp) increases from 0.38 to 0.83 Ω cm2, and the electrode ohmic resistance (Ro) increases from 1.79 to 2.14 Ω cm2. The grain growth and coarsening of impregnated LSCF nanoparticles are responsible for the performance degradation of the cathodes. XPS analysis shows the enrichment of cobalt on the surface of the infiltrated LSCF–GDC cathodes and such surface segregation could also contribute to the degradation of the electrocatalytic activity of the cathodes. Introducing MgO and LaNi0.6Fe0.4O3 phases can effectively suppress the coarsening of LSCF nanoparticles and enhance the stability of the cathodes. However, the enhancing effect is related to the conductivity and electrocatalytic activity of the introduced phases. |
| first_indexed | 2025-11-14T06:13:39Z |
| format | Journal Article |
| id | curtin-20.500.11937-6882 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T06:13:39Z |
| publishDate | 2013 |
| publisher | Elsevier B.V. |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-68822018-07-16T06:38:43Z A stability study of impregnated LSCF–GDC composite cathodes of solid oxide fuel cells Liu, Y. Wang, F. Chi, B. Pu, J. Jian, L. Jiang, San Ping degradation solid oxide fuel cells nano-structured lscf–gdc cathodes impregnation microstructure coarsening The performance degradation of composite cathodes of La0.6Sr0.4Co0.2Fe0.8O3−δ and Gd-doped ceria (LSCF–GDC), prepared by impregnating the porous GDC scaffold with a nitrate solution containing La, Sr, Co and Fe in desired composition, is investigated at 750 °C and open circuit in air for 500 h. The performance of the impregnated LSCF–GDC composite cathodes deteriorates after testing at 750 °C for 500 h; the electrode polarization resistance (Rp) increases from 0.38 to 0.83 Ω cm2, and the electrode ohmic resistance (Ro) increases from 1.79 to 2.14 Ω cm2. The grain growth and coarsening of impregnated LSCF nanoparticles are responsible for the performance degradation of the cathodes. XPS analysis shows the enrichment of cobalt on the surface of the infiltrated LSCF–GDC cathodes and such surface segregation could also contribute to the degradation of the electrocatalytic activity of the cathodes. Introducing MgO and LaNi0.6Fe0.4O3 phases can effectively suppress the coarsening of LSCF nanoparticles and enhance the stability of the cathodes. However, the enhancing effect is related to the conductivity and electrocatalytic activity of the introduced phases. 2013 Journal Article http://hdl.handle.net/20.500.11937/6882 10.1016/j.jallcom.2013.05.021 Elsevier B.V. fulltext |
| spellingShingle | degradation solid oxide fuel cells nano-structured lscf–gdc cathodes impregnation microstructure coarsening Liu, Y. Wang, F. Chi, B. Pu, J. Jian, L. Jiang, San Ping A stability study of impregnated LSCF–GDC composite cathodes of solid oxide fuel cells |
| title | A stability study of impregnated LSCF–GDC composite cathodes of solid oxide fuel cells |
| title_full | A stability study of impregnated LSCF–GDC composite cathodes of solid oxide fuel cells |
| title_fullStr | A stability study of impregnated LSCF–GDC composite cathodes of solid oxide fuel cells |
| title_full_unstemmed | A stability study of impregnated LSCF–GDC composite cathodes of solid oxide fuel cells |
| title_short | A stability study of impregnated LSCF–GDC composite cathodes of solid oxide fuel cells |
| title_sort | stability study of impregnated lscf–gdc composite cathodes of solid oxide fuel cells |
| topic | degradation solid oxide fuel cells nano-structured lscf–gdc cathodes impregnation microstructure coarsening |
| url | http://hdl.handle.net/20.500.11937/6882 |