A double-layer composite electrode based on SrSc0.2Co0.8O3-d perovskite with improved performance in intermediate temperature solid oxide fuel cells
Dual-layer composite electrodes consisting of a layer adjoining to an Sm0.2Ce0.8O1.9 (SDC) electrolyte composed of 70 wt.% SrSc0.2Co0.8O3-d + 30 wt.% Sm0.2Ce0.8O1.9 (SScC + SDC composite) and a second layer composed of 70 wt.% SrSc0.2Co0.8O3-d + 30 wt.% Sm0.5Sr0.5CoO3-d (SScC + SmSC composite) were...
| Main Authors: | , , , |
|---|---|
| Format: | Journal Article |
| Published: |
Elsevier Ltd
2010
|
| Online Access: | http://hdl.handle.net/20.500.11937/33442 |
| _version_ | 1848753947586592768 |
|---|---|
| author | An, B. Guo, Y. Ran, R. Shao, Zongping |
| author_facet | An, B. Guo, Y. Ran, R. Shao, Zongping |
| author_sort | An, B. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Dual-layer composite electrodes consisting of a layer adjoining to an Sm0.2Ce0.8O1.9 (SDC) electrolyte composed of 70 wt.% SrSc0.2Co0.8O3-d + 30 wt.% Sm0.2Ce0.8O1.9 (SScC + SDC composite) and a second layer composed of 70 wt.% SrSc0.2Co0.8O3-d + 30 wt.% Sm0.5Sr0.5CoO3-d (SScC + SmSC composite) were fabricated and investigated as potential cathodes in intermediate temperature solid-oxide fuel cells. Thermo-mechanical compatibility between the two electrode layers and between the electrode and the electrolyte were examined by SEM, XRD and EIS. After sintering, no clear boundary between SScC + SDC and SScC + SmSC layers was observable by SEM. The repeated thermal cycling didn't induce the delamination of the electrode from the electrolyte nor the formation of cracks within the electrode. As a result, stable electrode performance was achieved during thermal cycling and long-term operation. Symmetric cell tests demonstrated that the dual-layer electrode with a ~10-µm SScC + SDC layer and a ~50-µm SScC + SmSC layer (SScC + SDC/SScC + SmSC (1:5)) had the lowest electrode-polarization resistance among those tested. Anode-supported fuel cells with an SDC electrolyte and SScC + SDC/SScC + SmSC (1:5) cathode were fabricated. Peak power density as high as 1326 mW cm-2 was achieved at 650 °C, which was higher than for similar fuel cells with a single-layer SScC + SDC or an SScC + SmSC composite electrode. © 2010 Professor T. Nejat Veziroglu. |
| first_indexed | 2025-11-14T08:32:37Z |
| format | Journal Article |
| id | curtin-20.500.11937-33442 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T08:32:37Z |
| publishDate | 2010 |
| publisher | Elsevier Ltd |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-334422017-09-13T15:31:39Z A double-layer composite electrode based on SrSc0.2Co0.8O3-d perovskite with improved performance in intermediate temperature solid oxide fuel cells An, B. Guo, Y. Ran, R. Shao, Zongping Dual-layer composite electrodes consisting of a layer adjoining to an Sm0.2Ce0.8O1.9 (SDC) electrolyte composed of 70 wt.% SrSc0.2Co0.8O3-d + 30 wt.% Sm0.2Ce0.8O1.9 (SScC + SDC composite) and a second layer composed of 70 wt.% SrSc0.2Co0.8O3-d + 30 wt.% Sm0.5Sr0.5CoO3-d (SScC + SmSC composite) were fabricated and investigated as potential cathodes in intermediate temperature solid-oxide fuel cells. Thermo-mechanical compatibility between the two electrode layers and between the electrode and the electrolyte were examined by SEM, XRD and EIS. After sintering, no clear boundary between SScC + SDC and SScC + SmSC layers was observable by SEM. The repeated thermal cycling didn't induce the delamination of the electrode from the electrolyte nor the formation of cracks within the electrode. As a result, stable electrode performance was achieved during thermal cycling and long-term operation. Symmetric cell tests demonstrated that the dual-layer electrode with a ~10-µm SScC + SDC layer and a ~50-µm SScC + SmSC layer (SScC + SDC/SScC + SmSC (1:5)) had the lowest electrode-polarization resistance among those tested. Anode-supported fuel cells with an SDC electrolyte and SScC + SDC/SScC + SmSC (1:5) cathode were fabricated. Peak power density as high as 1326 mW cm-2 was achieved at 650 °C, which was higher than for similar fuel cells with a single-layer SScC + SDC or an SScC + SmSC composite electrode. © 2010 Professor T. Nejat Veziroglu. 2010 Journal Article http://hdl.handle.net/20.500.11937/33442 10.1016/j.ijhydene.2010.04.112 Elsevier Ltd restricted |
| spellingShingle | An, B. Guo, Y. Ran, R. Shao, Zongping A double-layer composite electrode based on SrSc0.2Co0.8O3-d perovskite with improved performance in intermediate temperature solid oxide fuel cells |
| title | A double-layer composite electrode based on SrSc0.2Co0.8O3-d perovskite with improved performance in intermediate temperature solid oxide fuel cells |
| title_full | A double-layer composite electrode based on SrSc0.2Co0.8O3-d perovskite with improved performance in intermediate temperature solid oxide fuel cells |
| title_fullStr | A double-layer composite electrode based on SrSc0.2Co0.8O3-d perovskite with improved performance in intermediate temperature solid oxide fuel cells |
| title_full_unstemmed | A double-layer composite electrode based on SrSc0.2Co0.8O3-d perovskite with improved performance in intermediate temperature solid oxide fuel cells |
| title_short | A double-layer composite electrode based on SrSc0.2Co0.8O3-d perovskite with improved performance in intermediate temperature solid oxide fuel cells |
| title_sort | double-layer composite electrode based on srsc0.2co0.8o3-d perovskite with improved performance in intermediate temperature solid oxide fuel cells |
| url | http://hdl.handle.net/20.500.11937/33442 |