Nb and Pd co-doped La0.57Sr0.38Co0.19Fe0.665Nb0.095Pd0.05O3-das a stable, high performance electrode for barrier-layer-free Y2O3-ZrO2electrolyte of solid oxide fuel cells
© 2017 Elsevier B.V. La 0.6 Sr 0.2 Co 0.2 Fe 0.8 O 3-d (LSCF) is the most intensively investigated high performance cathode for intermediate temperature solid oxide fuel cells (IT-SOFCs), but strontium segregation and migration at the electrode/electrolyte interface is a critical issue limiting the...
| Main Authors: | , , , , , , , , |
|---|---|
| Format: | Journal Article |
| Published: |
Elsevier SA
2018
|
| Online Access: | http://purl.org/au-research/grants/arc/DP150102025 http://hdl.handle.net/20.500.11937/62823 |
| _version_ | 1848760921990627328 |
|---|---|
| author | Chen, K. He, S. Li, N. Cheng, Y. Ai, N. Chen, M. Rickard, William Zhang, T. Jiang, S. |
| author_facet | Chen, K. He, S. Li, N. Cheng, Y. Ai, N. Chen, M. Rickard, William Zhang, T. Jiang, S. |
| author_sort | Chen, K. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | © 2017 Elsevier B.V. La 0.6 Sr 0.2 Co 0.2 Fe 0.8 O 3-d (LSCF) is the most intensively investigated high performance cathode for intermediate temperature solid oxide fuel cells (IT-SOFCs), but strontium segregation and migration at the electrode/electrolyte interface is a critical issue limiting the electrocatalytic activity and stability of LSCF based cathodes. Herein, we report a Nb and Pd co-doped LSCF (La 0.57 Sr 0.38 Co 0.19 Fe 0.665 Nb 0.095 Pd 0.05 O 3-d , LSCFNPd) perovskite as stable and active cathode on a barrier-layer-free anode-supported yttria-stabilized zirconia (YSZ) electrolyte cell using direct assembly method without pre-sintering at high temperatures. The cell exhibits a peak power density of 1.3 W cm -2 at 750 °C and excellent stability with no degradation during polarization at 500 mA cm -2 and 750 °C for 175 h. Microscopic and spectroscopic analysis show that the electrochemical polarization promotes the formation of electrode/electrolyte interface in operando and exsolution of Pd/PdO nanoparticles. The Nb doping in the B-site of LSCF significantly reduces the Sr surface segregation, enhancing the stability of the cathode, while the exsoluted Pd/PdO nanoparticles increases the electrocatalytic activity for the oxygen reduction reaction. The present study opens up a new route for the development of cobaltite-based perovskite cathodes with high activity and stability for barrier-layer-free YSZ electrolyte based IT-SOFCs. |
| first_indexed | 2025-11-14T10:23:28Z |
| format | Journal Article |
| id | curtin-20.500.11937-62823 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T10:23:28Z |
| publishDate | 2018 |
| publisher | Elsevier SA |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-628232023-08-02T06:39:10Z Nb and Pd co-doped La0.57Sr0.38Co0.19Fe0.665Nb0.095Pd0.05O3-das a stable, high performance electrode for barrier-layer-free Y2O3-ZrO2electrolyte of solid oxide fuel cells Chen, K. He, S. Li, N. Cheng, Y. Ai, N. Chen, M. Rickard, William Zhang, T. Jiang, S. © 2017 Elsevier B.V. La 0.6 Sr 0.2 Co 0.2 Fe 0.8 O 3-d (LSCF) is the most intensively investigated high performance cathode for intermediate temperature solid oxide fuel cells (IT-SOFCs), but strontium segregation and migration at the electrode/electrolyte interface is a critical issue limiting the electrocatalytic activity and stability of LSCF based cathodes. Herein, we report a Nb and Pd co-doped LSCF (La 0.57 Sr 0.38 Co 0.19 Fe 0.665 Nb 0.095 Pd 0.05 O 3-d , LSCFNPd) perovskite as stable and active cathode on a barrier-layer-free anode-supported yttria-stabilized zirconia (YSZ) electrolyte cell using direct assembly method without pre-sintering at high temperatures. The cell exhibits a peak power density of 1.3 W cm -2 at 750 °C and excellent stability with no degradation during polarization at 500 mA cm -2 and 750 °C for 175 h. Microscopic and spectroscopic analysis show that the electrochemical polarization promotes the formation of electrode/electrolyte interface in operando and exsolution of Pd/PdO nanoparticles. The Nb doping in the B-site of LSCF significantly reduces the Sr surface segregation, enhancing the stability of the cathode, while the exsoluted Pd/PdO nanoparticles increases the electrocatalytic activity for the oxygen reduction reaction. The present study opens up a new route for the development of cobaltite-based perovskite cathodes with high activity and stability for barrier-layer-free YSZ electrolyte based IT-SOFCs. 2018 Journal Article http://hdl.handle.net/20.500.11937/62823 10.1016/j.jpowsour.2017.12.066 http://purl.org/au-research/grants/arc/DP150102025 http://purl.org/au-research/grants/arc/DP150102044 http://purl.org/au-research/grants/arc/DP180100731 Elsevier SA restricted |
| spellingShingle | Chen, K. He, S. Li, N. Cheng, Y. Ai, N. Chen, M. Rickard, William Zhang, T. Jiang, S. Nb and Pd co-doped La0.57Sr0.38Co0.19Fe0.665Nb0.095Pd0.05O3-das a stable, high performance electrode for barrier-layer-free Y2O3-ZrO2electrolyte of solid oxide fuel cells |
| title | Nb and Pd co-doped La0.57Sr0.38Co0.19Fe0.665Nb0.095Pd0.05O3-das a stable, high performance electrode for barrier-layer-free Y2O3-ZrO2electrolyte of solid oxide fuel cells |
| title_full | Nb and Pd co-doped La0.57Sr0.38Co0.19Fe0.665Nb0.095Pd0.05O3-das a stable, high performance electrode for barrier-layer-free Y2O3-ZrO2electrolyte of solid oxide fuel cells |
| title_fullStr | Nb and Pd co-doped La0.57Sr0.38Co0.19Fe0.665Nb0.095Pd0.05O3-das a stable, high performance electrode for barrier-layer-free Y2O3-ZrO2electrolyte of solid oxide fuel cells |
| title_full_unstemmed | Nb and Pd co-doped La0.57Sr0.38Co0.19Fe0.665Nb0.095Pd0.05O3-das a stable, high performance electrode for barrier-layer-free Y2O3-ZrO2electrolyte of solid oxide fuel cells |
| title_short | Nb and Pd co-doped La0.57Sr0.38Co0.19Fe0.665Nb0.095Pd0.05O3-das a stable, high performance electrode for barrier-layer-free Y2O3-ZrO2electrolyte of solid oxide fuel cells |
| title_sort | nb and pd co-doped la0.57sr0.38co0.19fe0.665nb0.095pd0.05o3-das a stable, high performance electrode for barrier-layer-free y2o3-zro2electrolyte of solid oxide fuel cells |
| url | http://purl.org/au-research/grants/arc/DP150102025 http://purl.org/au-research/grants/arc/DP150102025 http://purl.org/au-research/grants/arc/DP150102025 http://hdl.handle.net/20.500.11937/62823 |