Effect of firing temperature on the microstructure and performance of PrBaCo2O5+d cathodes on Sm0.2Ce0.8O1.9 electrolytes fabricated by spray deposition-firing processes
The effect of firing temperature on the microstructure and performance of PrBaCo2O5+d cathodes on Sm0.2Ce0.8O1.9 electrolytes fabricated by spray deposition-firing processes is systematically studied by various characterization techniques. The grain size, porosity and particle connection of the elec...
| Main Authors: | , , |
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| Format: | Journal Article |
| Published: |
Elsevier SA
2010
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| Online Access: | http://hdl.handle.net/20.500.11937/25033 |
| _version_ | 1848751594482434048 |
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| author | Chen, D. Ran, R. Shao, Zongping |
| author_facet | Chen, D. Ran, R. Shao, Zongping |
| author_sort | Chen, D. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | The effect of firing temperature on the microstructure and performance of PrBaCo2O5+d cathodes on Sm0.2Ce0.8O1.9 electrolytes fabricated by spray deposition-firing processes is systematically studied by various characterization techniques. The grain size, porosity and particle connection of the electrode as well as the physical contact between the PrBaCo2O5+d and Sm0.2Ce0.8O1.9 layers are influenced differently by the firing temperature. The area specific resistances (ASRs) of the various PrBaCo2O5+d cathodes are measured by electrochemical impedance spectroscopy in both symmetrical two-electrode and three-electrode configurations. The lowest ASR and cathode overpotential are achieved at a firing temperature of 1000 °C. Two main oxygen reduction reaction processes are proposed according to the oxygen partial pressure dependence of the electrode ASR. The rate-determining step is transmitted from a charge-transfer process at low firing temperatures to a non-charge-transfer process at high firing temperatures. A fuel cell with the PrBaCo2O5+d cathode fired at an optimal temperature of 1000 °C delivers the attractive peak power density of 835 mW cm-2 at 650 °C, while this density is much lower for other firing temperatures. This result suggests the firing temperature of PrBaCo2O5+d electrodes should be carefully optimized for practical applications. © 2010 Elsevier B.V. All rights reserved. |
| first_indexed | 2025-11-14T07:55:13Z |
| format | Journal Article |
| id | curtin-20.500.11937-25033 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:55:13Z |
| publishDate | 2010 |
| publisher | Elsevier SA |
| recordtype | eprints |
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| spelling | curtin-20.500.11937-250332017-09-13T15:20:31Z Effect of firing temperature on the microstructure and performance of PrBaCo2O5+d cathodes on Sm0.2Ce0.8O1.9 electrolytes fabricated by spray deposition-firing processes Chen, D. Ran, R. Shao, Zongping The effect of firing temperature on the microstructure and performance of PrBaCo2O5+d cathodes on Sm0.2Ce0.8O1.9 electrolytes fabricated by spray deposition-firing processes is systematically studied by various characterization techniques. The grain size, porosity and particle connection of the electrode as well as the physical contact between the PrBaCo2O5+d and Sm0.2Ce0.8O1.9 layers are influenced differently by the firing temperature. The area specific resistances (ASRs) of the various PrBaCo2O5+d cathodes are measured by electrochemical impedance spectroscopy in both symmetrical two-electrode and three-electrode configurations. The lowest ASR and cathode overpotential are achieved at a firing temperature of 1000 °C. Two main oxygen reduction reaction processes are proposed according to the oxygen partial pressure dependence of the electrode ASR. The rate-determining step is transmitted from a charge-transfer process at low firing temperatures to a non-charge-transfer process at high firing temperatures. A fuel cell with the PrBaCo2O5+d cathode fired at an optimal temperature of 1000 °C delivers the attractive peak power density of 835 mW cm-2 at 650 °C, while this density is much lower for other firing temperatures. This result suggests the firing temperature of PrBaCo2O5+d electrodes should be carefully optimized for practical applications. © 2010 Elsevier B.V. All rights reserved. 2010 Journal Article http://hdl.handle.net/20.500.11937/25033 10.1016/j.jpowsour.2010.01.082 Elsevier SA restricted |
| spellingShingle | Chen, D. Ran, R. Shao, Zongping Effect of firing temperature on the microstructure and performance of PrBaCo2O5+d cathodes on Sm0.2Ce0.8O1.9 electrolytes fabricated by spray deposition-firing processes |
| title | Effect of firing temperature on the microstructure and performance of PrBaCo2O5+d cathodes on Sm0.2Ce0.8O1.9 electrolytes fabricated by spray deposition-firing processes |
| title_full | Effect of firing temperature on the microstructure and performance of PrBaCo2O5+d cathodes on Sm0.2Ce0.8O1.9 electrolytes fabricated by spray deposition-firing processes |
| title_fullStr | Effect of firing temperature on the microstructure and performance of PrBaCo2O5+d cathodes on Sm0.2Ce0.8O1.9 electrolytes fabricated by spray deposition-firing processes |
| title_full_unstemmed | Effect of firing temperature on the microstructure and performance of PrBaCo2O5+d cathodes on Sm0.2Ce0.8O1.9 electrolytes fabricated by spray deposition-firing processes |
| title_short | Effect of firing temperature on the microstructure and performance of PrBaCo2O5+d cathodes on Sm0.2Ce0.8O1.9 electrolytes fabricated by spray deposition-firing processes |
| title_sort | effect of firing temperature on the microstructure and performance of prbaco2o5+d cathodes on sm0.2ce0.8o1.9 electrolytes fabricated by spray deposition-firing processes |
| url | http://hdl.handle.net/20.500.11937/25033 |