Fluorine Anion-Doped Ba<sub>0.6</sub>Sr<sub>0.4</sub>Co<sub>0.7</sub>Fe<sub>0.2</sub>Nb<sub>0.1</sub>O<sub>3-δ</sub> as a Promising Cathode for Protonic Ceramic Fuel Cells
The widespread application of protonic ceramic fuel cells is limited by the lack of oxygen electrodes with excellent activity and stability. Herein, the strategy of halogen doping in a Ba<sub>0.6</sub>Sr<sub>0.4</sub>Co<sub>0.7</sub>Fe<sub>0.2</sub>Nb&...
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MDPI AG
2023-04-01
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| Series: | Catalysts |
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| Online Access: | https://www.mdpi.com/2073-4344/13/5/793 |
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| author | Yang Liu Shanshan Jiang Hao Qiu Wei Wang Elaine Miller Chao Su |
| author_facet | Yang Liu Shanshan Jiang Hao Qiu Wei Wang Elaine Miller Chao Su |
| author_sort | Yang Liu |
| collection | DOAJ |
| description | The widespread application of protonic ceramic fuel cells is limited by the lack of oxygen electrodes with excellent activity and stability. Herein, the strategy of halogen doping in a Ba<sub>0.6</sub>Sr<sub>0.4</sub>Co<sub>0.7</sub>Fe<sub>0.2</sub>Nb<sub>0.1</sub>O<sub>3-δ</sub> (BSCFN) cathode is discussed in detail for improving cathode activity. Ba<sub>0.6</sub>Sr<sub>0.4</sub>Co<sub>0.7</sub>Fe<sub>0.2</sub>Nb<sub>0.1</sub>O<sub>3-x-δ</sub>F<sub>x</sub> (x = 0, 0.05, 0.1) cathode materials are synthesised by a solid-phase method. The XRD results show that fluorine anion-doped BSCFN forms a single-phase perovskite structure. XPS and titration results reveal that fluorine ion doping increases active oxygen and surface adsorbed oxygen. It also confines chemical bonds between cations and anions, which enhances the cathode’s catalytic performance. Therefore, an anode-supported single cell with the configuration of Ni-BaZr<sub>0.1</sub>Ce<sub>0.7</sub>Y<sub>0.1</sub>Yb<sub>0.1</sub>O<sub>3-δ</sub> (BZCYYb)|BZCYYb|Ba<sub>0.6</sub>Sr<sub>0.4</sub>Co<sub>0.7</sub>Fe<sub>0.2</sub>Nb<sub>0.1</sub>O<sub>3-0.1-δ</sub>F<sub>0.1</sub> (BSCFN-F<sub>0.1</sub>) achieved a high peak power density of 630 mW cm<sup>−2</sup> at 600 °C. Moreover, according to the symmetrical cell test, the BSCFN-F<sub>0.1</sub> electrode demonstrated a superb stability for nearly 400 h at 600 °C. This work focuses on the influence of fluorine anion incorporation upon the performance of cathode materials. It also analyses and discusses the effects of different fluorine ion incorporation amounts to occupy different oxygen positions. |
| first_indexed | 2024-03-11T03:52:03Z |
| format | Article |
| id | doaj.art-c890c5bf58604ed5ab0fba00dd6d1683 |
| institution | Directory Open Access Journal |
| issn | 2073-4344 |
| language | English |
| last_indexed | 2024-03-11T03:52:03Z |
| publishDate | 2023-04-01 |
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| record_format | Article |
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| spelling | doaj.art-c890c5bf58604ed5ab0fba00dd6d16832023-11-18T00:50:15ZengMDPI AGCatalysts2073-43442023-04-0113579310.3390/catal13050793Fluorine Anion-Doped Ba<sub>0.6</sub>Sr<sub>0.4</sub>Co<sub>0.7</sub>Fe<sub>0.2</sub>Nb<sub>0.1</sub>O<sub>3-δ</sub> as a Promising Cathode for Protonic Ceramic Fuel CellsYang Liu0Shanshan Jiang1Hao Qiu2Wei Wang3Elaine Miller4Chao Su5School of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang 212100, ChinaSchool of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang 212100, ChinaSchool of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang 212100, ChinaState Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 211816, ChinaMicroscopy and Microanalysis Facility (MMF), John de Laeter Centre, Curtin University, Perth, WA 6102, AustraliaSchool of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang 212100, ChinaThe widespread application of protonic ceramic fuel cells is limited by the lack of oxygen electrodes with excellent activity and stability. Herein, the strategy of halogen doping in a Ba<sub>0.6</sub>Sr<sub>0.4</sub>Co<sub>0.7</sub>Fe<sub>0.2</sub>Nb<sub>0.1</sub>O<sub>3-δ</sub> (BSCFN) cathode is discussed in detail for improving cathode activity. Ba<sub>0.6</sub>Sr<sub>0.4</sub>Co<sub>0.7</sub>Fe<sub>0.2</sub>Nb<sub>0.1</sub>O<sub>3-x-δ</sub>F<sub>x</sub> (x = 0, 0.05, 0.1) cathode materials are synthesised by a solid-phase method. The XRD results show that fluorine anion-doped BSCFN forms a single-phase perovskite structure. XPS and titration results reveal that fluorine ion doping increases active oxygen and surface adsorbed oxygen. It also confines chemical bonds between cations and anions, which enhances the cathode’s catalytic performance. Therefore, an anode-supported single cell with the configuration of Ni-BaZr<sub>0.1</sub>Ce<sub>0.7</sub>Y<sub>0.1</sub>Yb<sub>0.1</sub>O<sub>3-δ</sub> (BZCYYb)|BZCYYb|Ba<sub>0.6</sub>Sr<sub>0.4</sub>Co<sub>0.7</sub>Fe<sub>0.2</sub>Nb<sub>0.1</sub>O<sub>3-0.1-δ</sub>F<sub>0.1</sub> (BSCFN-F<sub>0.1</sub>) achieved a high peak power density of 630 mW cm<sup>−2</sup> at 600 °C. Moreover, according to the symmetrical cell test, the BSCFN-F<sub>0.1</sub> electrode demonstrated a superb stability for nearly 400 h at 600 °C. This work focuses on the influence of fluorine anion incorporation upon the performance of cathode materials. It also analyses and discusses the effects of different fluorine ion incorporation amounts to occupy different oxygen positions.https://www.mdpi.com/2073-4344/13/5/793protonic ceramic fuel cellsperovskitehalogen dopingcathodeactive oxygen |
| spellingShingle | Yang Liu Shanshan Jiang Hao Qiu Wei Wang Elaine Miller Chao Su Fluorine Anion-Doped Ba<sub>0.6</sub>Sr<sub>0.4</sub>Co<sub>0.7</sub>Fe<sub>0.2</sub>Nb<sub>0.1</sub>O<sub>3-δ</sub> as a Promising Cathode for Protonic Ceramic Fuel Cells Catalysts protonic ceramic fuel cells perovskite halogen doping cathode active oxygen |
| title | Fluorine Anion-Doped Ba<sub>0.6</sub>Sr<sub>0.4</sub>Co<sub>0.7</sub>Fe<sub>0.2</sub>Nb<sub>0.1</sub>O<sub>3-δ</sub> as a Promising Cathode for Protonic Ceramic Fuel Cells |
| title_full | Fluorine Anion-Doped Ba<sub>0.6</sub>Sr<sub>0.4</sub>Co<sub>0.7</sub>Fe<sub>0.2</sub>Nb<sub>0.1</sub>O<sub>3-δ</sub> as a Promising Cathode for Protonic Ceramic Fuel Cells |
| title_fullStr | Fluorine Anion-Doped Ba<sub>0.6</sub>Sr<sub>0.4</sub>Co<sub>0.7</sub>Fe<sub>0.2</sub>Nb<sub>0.1</sub>O<sub>3-δ</sub> as a Promising Cathode for Protonic Ceramic Fuel Cells |
| title_full_unstemmed | Fluorine Anion-Doped Ba<sub>0.6</sub>Sr<sub>0.4</sub>Co<sub>0.7</sub>Fe<sub>0.2</sub>Nb<sub>0.1</sub>O<sub>3-δ</sub> as a Promising Cathode for Protonic Ceramic Fuel Cells |
| title_short | Fluorine Anion-Doped Ba<sub>0.6</sub>Sr<sub>0.4</sub>Co<sub>0.7</sub>Fe<sub>0.2</sub>Nb<sub>0.1</sub>O<sub>3-δ</sub> as a Promising Cathode for Protonic Ceramic Fuel Cells |
| title_sort | fluorine anion doped ba sub 0 6 sub sr sub 0 4 sub co sub 0 7 sub fe sub 0 2 sub nb sub 0 1 sub o sub 3 δ sub as a promising cathode for protonic ceramic fuel cells |
| topic | protonic ceramic fuel cells perovskite halogen doping cathode active oxygen |
| url | https://www.mdpi.com/2073-4344/13/5/793 |
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