SrCo0.8Ti0.1Ta0.1O3-δ perovskite: A new highly active and durable cathode material for intermediate-temperature solid oxide fuel cells
Reducing the operating temperatures of solid oxide fuel cells (SOFCs) to the intermediate-temperature range (IT, 400–650 °C) can bring about several benefits including cost effectiveness, prolonged lifetime and flexible sealing. Nevertheless, the accompanying deterioration of cathodic activity for o...
| Main Authors: | , , , , , , , , |
|---|---|
| Format: | Journal Article |
| Language: | English |
| Published: |
ELSEVIER SCI LTD
2021
|
| Subjects: | |
| Online Access: | http://purl.org/au-research/grants/arc/DP150104365 http://hdl.handle.net/20.500.11937/91962 |
| _version_ | 1848765606699991040 |
|---|---|
| author | Gu, H. Xu, M. Song, Y. Zhou, C. Su, Chao Wang, Wei Ran, R. Zhou, W. Shao, Zongping |
| author_facet | Gu, H. Xu, M. Song, Y. Zhou, C. Su, Chao Wang, Wei Ran, R. Zhou, W. Shao, Zongping |
| author_sort | Gu, H. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Reducing the operating temperatures of solid oxide fuel cells (SOFCs) to the intermediate-temperature range (IT, 400–650 °C) can bring about several benefits including cost effectiveness, prolonged lifetime and flexible sealing. Nevertheless, the accompanying deterioration of cathodic activity for oxygen reduction reaction (ORR) introduces a large obstacle for commercial applications of IT-SOFCs. Herein, a new perovskite SrCo0.8Ti0.1Ta0.1O3-δ (SCTT) is developed by co-doping titanium and tantalum into the B-site of parent SrCoO3 oxide, which may tackle this problem. At 400–650 °C, SCTT shows high electrical conductivities (65–142 S cm−1), appropriate oxygen vacancy concentrations (0.23–0.27) and high bulk diffusion capability due to a synergy between the two dopants in SCTT. Consequently, SCTT exhibits a favorable ORR activity with an area-specific resistance of only 0.17 Ω cm2 at 500 °C on samaria-doped ceria electrolyte, and the corresponding cell generates a high peak power density (PPD) of 0.90 W cm−2 at 500 °C with negligible performance decay for 180 h. Additionally, SCTT performs well in protonic ceramic fuel cells, achieving a PPD of 0.78 W cm−2 at 650 °C and a high durability for ~176 h at 550 °C. This work provides a new promising cathode material that may accelerate the commercialization of IT-SOFC technology. |
| first_indexed | 2025-11-14T11:37:56Z |
| format | Journal Article |
| id | curtin-20.500.11937-91962 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-14T11:37:56Z |
| publishDate | 2021 |
| publisher | ELSEVIER SCI LTD |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-919622023-06-08T06:40:54Z SrCo0.8Ti0.1Ta0.1O3-δ perovskite: A new highly active and durable cathode material for intermediate-temperature solid oxide fuel cells Gu, H. Xu, M. Song, Y. Zhou, C. Su, Chao Wang, Wei Ran, R. Zhou, W. Shao, Zongping Science & Technology Technology Engineering, Multidisciplinary Materials Science, Composites Engineering Materials Science Solid oxide fuel cell Perovskite oxide Co-doping Cathode Oxygen reduction CO-DOPED PEROVSKITE OXYGEN REDUCTION REACTION HIGH-PERFORMANCE CATHODE CRYSTAL-STRUCTURE SURFACE EXCHANGE ELECTRONEGATIVITY DIFFUSION EFFICIENT ELECTROCATALYSTS SRCOO3-DELTA Reducing the operating temperatures of solid oxide fuel cells (SOFCs) to the intermediate-temperature range (IT, 400–650 °C) can bring about several benefits including cost effectiveness, prolonged lifetime and flexible sealing. Nevertheless, the accompanying deterioration of cathodic activity for oxygen reduction reaction (ORR) introduces a large obstacle for commercial applications of IT-SOFCs. Herein, a new perovskite SrCo0.8Ti0.1Ta0.1O3-δ (SCTT) is developed by co-doping titanium and tantalum into the B-site of parent SrCoO3 oxide, which may tackle this problem. At 400–650 °C, SCTT shows high electrical conductivities (65–142 S cm−1), appropriate oxygen vacancy concentrations (0.23–0.27) and high bulk diffusion capability due to a synergy between the two dopants in SCTT. Consequently, SCTT exhibits a favorable ORR activity with an area-specific resistance of only 0.17 Ω cm2 at 500 °C on samaria-doped ceria electrolyte, and the corresponding cell generates a high peak power density (PPD) of 0.90 W cm−2 at 500 °C with negligible performance decay for 180 h. Additionally, SCTT performs well in protonic ceramic fuel cells, achieving a PPD of 0.78 W cm−2 at 650 °C and a high durability for ~176 h at 550 °C. This work provides a new promising cathode material that may accelerate the commercialization of IT-SOFC technology. 2021 Journal Article http://hdl.handle.net/20.500.11937/91962 10.1016/j.compositesb.2021.108726 English http://purl.org/au-research/grants/arc/DP150104365 http://purl.org/au-research/grants/arc/DP160104835 ELSEVIER SCI LTD restricted |
| spellingShingle | Science & Technology Technology Engineering, Multidisciplinary Materials Science, Composites Engineering Materials Science Solid oxide fuel cell Perovskite oxide Co-doping Cathode Oxygen reduction CO-DOPED PEROVSKITE OXYGEN REDUCTION REACTION HIGH-PERFORMANCE CATHODE CRYSTAL-STRUCTURE SURFACE EXCHANGE ELECTRONEGATIVITY DIFFUSION EFFICIENT ELECTROCATALYSTS SRCOO3-DELTA Gu, H. Xu, M. Song, Y. Zhou, C. Su, Chao Wang, Wei Ran, R. Zhou, W. Shao, Zongping SrCo0.8Ti0.1Ta0.1O3-δ perovskite: A new highly active and durable cathode material for intermediate-temperature solid oxide fuel cells |
| title | SrCo0.8Ti0.1Ta0.1O3-δ perovskite: A new highly active and durable cathode material for intermediate-temperature solid oxide fuel cells |
| title_full | SrCo0.8Ti0.1Ta0.1O3-δ perovskite: A new highly active and durable cathode material for intermediate-temperature solid oxide fuel cells |
| title_fullStr | SrCo0.8Ti0.1Ta0.1O3-δ perovskite: A new highly active and durable cathode material for intermediate-temperature solid oxide fuel cells |
| title_full_unstemmed | SrCo0.8Ti0.1Ta0.1O3-δ perovskite: A new highly active and durable cathode material for intermediate-temperature solid oxide fuel cells |
| title_short | SrCo0.8Ti0.1Ta0.1O3-δ perovskite: A new highly active and durable cathode material for intermediate-temperature solid oxide fuel cells |
| title_sort | srco0.8ti0.1ta0.1o3-δ perovskite: a new highly active and durable cathode material for intermediate-temperature solid oxide fuel cells |
| topic | Science & Technology Technology Engineering, Multidisciplinary Materials Science, Composites Engineering Materials Science Solid oxide fuel cell Perovskite oxide Co-doping Cathode Oxygen reduction CO-DOPED PEROVSKITE OXYGEN REDUCTION REACTION HIGH-PERFORMANCE CATHODE CRYSTAL-STRUCTURE SURFACE EXCHANGE ELECTRONEGATIVITY DIFFUSION EFFICIENT ELECTROCATALYSTS SRCOO3-DELTA |
| url | http://purl.org/au-research/grants/arc/DP150104365 http://purl.org/au-research/grants/arc/DP150104365 http://hdl.handle.net/20.500.11937/91962 |