High-performance SrNb0.1Co0.9-xFexO 3-d perovskite cathodes for low-temperature solid oxide fuel cells
Chemical to electrical energy conversion using a solid oxide fuel cell (SOFC) becomes more practical as the operating temperature is lowered to 600 °C and below. Given the thermally activated nature of the oxygen reduction reaction (ORR) at the cathode side, development of cathode catalysts with ver...
| Main Authors: | , , , , |
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| Format: | Journal Article |
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Royal Society of Chemistry
2014
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| Online Access: | http://hdl.handle.net/20.500.11937/25268 |
| _version_ | 1848751661185499136 |
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| author | Zhu, Y. Sunarso, J. Zhou, W. Jiang, S. Shao, Zongping |
| author_facet | Zhu, Y. Sunarso, J. Zhou, W. Jiang, S. Shao, Zongping |
| author_sort | Zhu, Y. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Chemical to electrical energy conversion using a solid oxide fuel cell (SOFC) becomes more practical as the operating temperature is lowered to 600 °C and below. Given the thermally activated nature of the oxygen reduction reaction (ORR) at the cathode side, development of cathode catalysts with very low polarisation resistance is essential. Here, we showed that partial substitution of Co within SrNb0.1Co0.9O 3-d by Fe (up to 0.5) triggers the formation of oxygen non-stoichiometry while preserving the primitive cubic lattice, thus substantially enhancing the ORR performance below 600 °C (relative to the parent compound). Close correlation between the oxygen non-stoichiometry and ORR activity trends was found to some extent. SrNb0.1Co 0.7Fe0.2O3-d (SNCF0.2) cathode exhibits a very low area specific resistance value of 0.052 O cm2 at 600 °C which translates to superior fuel cell performance, e.g. peak power density of 1587 mW cm-2 at 600 °C. Moreover, the synergistic relationship between ORR activity, thermal expansion coefficient and enhanced CO2 resistance attests to the significance of the SNCF cathode. The last attribute is envisioned as a dominant factor for applications using alternative fuels (e.g. CO which normally contains CO2) and in a portable single-chamber SOFC. |
| first_indexed | 2025-11-14T07:56:16Z |
| format | Journal Article |
| id | curtin-20.500.11937-25268 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:56:16Z |
| publishDate | 2014 |
| publisher | Royal Society of Chemistry |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-252682017-09-13T15:20:30Z High-performance SrNb0.1Co0.9-xFexO 3-d perovskite cathodes for low-temperature solid oxide fuel cells Zhu, Y. Sunarso, J. Zhou, W. Jiang, S. Shao, Zongping Chemical to electrical energy conversion using a solid oxide fuel cell (SOFC) becomes more practical as the operating temperature is lowered to 600 °C and below. Given the thermally activated nature of the oxygen reduction reaction (ORR) at the cathode side, development of cathode catalysts with very low polarisation resistance is essential. Here, we showed that partial substitution of Co within SrNb0.1Co0.9O 3-d by Fe (up to 0.5) triggers the formation of oxygen non-stoichiometry while preserving the primitive cubic lattice, thus substantially enhancing the ORR performance below 600 °C (relative to the parent compound). Close correlation between the oxygen non-stoichiometry and ORR activity trends was found to some extent. SrNb0.1Co 0.7Fe0.2O3-d (SNCF0.2) cathode exhibits a very low area specific resistance value of 0.052 O cm2 at 600 °C which translates to superior fuel cell performance, e.g. peak power density of 1587 mW cm-2 at 600 °C. Moreover, the synergistic relationship between ORR activity, thermal expansion coefficient and enhanced CO2 resistance attests to the significance of the SNCF cathode. The last attribute is envisioned as a dominant factor for applications using alternative fuels (e.g. CO which normally contains CO2) and in a portable single-chamber SOFC. 2014 Journal Article http://hdl.handle.net/20.500.11937/25268 10.1039/c4ta03208j Royal Society of Chemistry restricted |
| spellingShingle | Zhu, Y. Sunarso, J. Zhou, W. Jiang, S. Shao, Zongping High-performance SrNb0.1Co0.9-xFexO 3-d perovskite cathodes for low-temperature solid oxide fuel cells |
| title | High-performance SrNb0.1Co0.9-xFexO 3-d perovskite cathodes for low-temperature solid oxide fuel cells |
| title_full | High-performance SrNb0.1Co0.9-xFexO 3-d perovskite cathodes for low-temperature solid oxide fuel cells |
| title_fullStr | High-performance SrNb0.1Co0.9-xFexO 3-d perovskite cathodes for low-temperature solid oxide fuel cells |
| title_full_unstemmed | High-performance SrNb0.1Co0.9-xFexO 3-d perovskite cathodes for low-temperature solid oxide fuel cells |
| title_short | High-performance SrNb0.1Co0.9-xFexO 3-d perovskite cathodes for low-temperature solid oxide fuel cells |
| title_sort | high-performance srnb0.1co0.9-xfexo 3-d perovskite cathodes for low-temperature solid oxide fuel cells |
| url | http://hdl.handle.net/20.500.11937/25268 |