Coking-resistant Ce0.8Ni0.2O2-δ internal reforming layer for direct methane solid oxide fuel cells
The development of direct methane solid oxide fuel cells (SOFCs) is severely hindered by the deactivation of conventional Ni-based anodes due to carbon fouling. Here, a Ce0.8Ni0.2O2-d(CNO) internal reforming layer is imposed on conventional Ni-Sm0.2Ce0.8O2-x(SDC) anodes for direct methane SOFCs. In...
| Main Authors: | , , , , , |
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| Format: | Journal Article |
| Published: |
Pergamon
2018
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| Online Access: | http://hdl.handle.net/20.500.11937/70030 |
| _version_ | 1848762196994031616 |
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| author | Zhao, J. Xu, X. Li, M. Zhou, W. Liu, Shaomin Zhu, Z. |
| author_facet | Zhao, J. Xu, X. Li, M. Zhou, W. Liu, Shaomin Zhu, Z. |
| author_sort | Zhao, J. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | The development of direct methane solid oxide fuel cells (SOFCs) is severely hindered by the deactivation of conventional Ni-based anodes due to carbon fouling. Here, a Ce0.8Ni0.2O2-d(CNO) internal reforming layer is imposed on conventional Ni-Sm0.2Ce0.8O2-x(SDC) anodes for direct methane SOFCs. In CNO, there are two types of Ni species which are segregated NiO dispersed over the CNO and incorporated Ni2+in the ceria lattice, respectively. The Ni2+dopants are stable in wet hydrogen at 650 °C; however, the segregated NiO is reduced into Ni under the same conditions. With the doping of Ni2+into the ceria lattice, surface oxygen vacancies are generated in CNO. For the stability testing in wet methane (~3 mol% H2O in methane) at 650 °C and 0.2 A cm-2, the voltage of the conventional Ni-SDC anode decreases by 43.1% in approximately 26 h, whereas the CNO internal reforming layer operates stably for 40 h. In wet methane at 650 °C, with the addition of the CNO internal reforming layer, the polarization resistance of the Ni-SDC anode reduces by 22.3% from 0.0917 to 0.0712 O cm2, and the maximum current density of it increases from 614 to 664 mW cm-2. |
| first_indexed | 2025-11-14T10:43:44Z |
| format | Journal Article |
| id | curtin-20.500.11937-70030 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T10:43:44Z |
| publishDate | 2018 |
| publisher | Pergamon |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-700302018-12-13T01:14:53Z Coking-resistant Ce0.8Ni0.2O2-δ internal reforming layer for direct methane solid oxide fuel cells Zhao, J. Xu, X. Li, M. Zhou, W. Liu, Shaomin Zhu, Z. The development of direct methane solid oxide fuel cells (SOFCs) is severely hindered by the deactivation of conventional Ni-based anodes due to carbon fouling. Here, a Ce0.8Ni0.2O2-d(CNO) internal reforming layer is imposed on conventional Ni-Sm0.2Ce0.8O2-x(SDC) anodes for direct methane SOFCs. In CNO, there are two types of Ni species which are segregated NiO dispersed over the CNO and incorporated Ni2+in the ceria lattice, respectively. The Ni2+dopants are stable in wet hydrogen at 650 °C; however, the segregated NiO is reduced into Ni under the same conditions. With the doping of Ni2+into the ceria lattice, surface oxygen vacancies are generated in CNO. For the stability testing in wet methane (~3 mol% H2O in methane) at 650 °C and 0.2 A cm-2, the voltage of the conventional Ni-SDC anode decreases by 43.1% in approximately 26 h, whereas the CNO internal reforming layer operates stably for 40 h. In wet methane at 650 °C, with the addition of the CNO internal reforming layer, the polarization resistance of the Ni-SDC anode reduces by 22.3% from 0.0917 to 0.0712 O cm2, and the maximum current density of it increases from 614 to 664 mW cm-2. 2018 Journal Article http://hdl.handle.net/20.500.11937/70030 10.1016/j.electacta.2018.06.088 Pergamon restricted |
| spellingShingle | Zhao, J. Xu, X. Li, M. Zhou, W. Liu, Shaomin Zhu, Z. Coking-resistant Ce0.8Ni0.2O2-δ internal reforming layer for direct methane solid oxide fuel cells |
| title | Coking-resistant Ce0.8Ni0.2O2-δ internal reforming layer for direct methane solid oxide fuel cells |
| title_full | Coking-resistant Ce0.8Ni0.2O2-δ internal reforming layer for direct methane solid oxide fuel cells |
| title_fullStr | Coking-resistant Ce0.8Ni0.2O2-δ internal reforming layer for direct methane solid oxide fuel cells |
| title_full_unstemmed | Coking-resistant Ce0.8Ni0.2O2-δ internal reforming layer for direct methane solid oxide fuel cells |
| title_short | Coking-resistant Ce0.8Ni0.2O2-δ internal reforming layer for direct methane solid oxide fuel cells |
| title_sort | coking-resistant ce0.8ni0.2o2-δ internal reforming layer for direct methane solid oxide fuel cells |
| url | http://hdl.handle.net/20.500.11937/70030 |