Manipulating Nb-doped SrFeO <sub>3− </sub><sub><em>δ </em></sub>with excellent performance for proton-conducting solid oxide fuel cells
<p dir="ltr">Nb-doped SrFeO<sub>3−</sub><sub><em>δ</em></sub> (SFO) is used as a cathode in proton-conducting solid oxide fuel cells (H-SOFCs). First-principles calculations show that the SrFe<sub>0.9</sub>Nb<sub>0.1</sub>O&...
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2024
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| _version_ | 1864513510162038784 |
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| author | Hailu Dai (19239613) |
| author2 | Hongzhe Du (11955738) Samir Boulfrad (17823419) Shoufu Yu (19239616) Lei Bi (1944472) Qinfang Zhang (5491889) |
| author2_role | author author author author author |
| author_facet | Hailu Dai (19239613) Hongzhe Du (11955738) Samir Boulfrad (17823419) Shoufu Yu (19239616) Lei Bi (1944472) Qinfang Zhang (5491889) |
| author_role | author |
| dc.creator.none.fl_str_mv | Hailu Dai (19239613) Hongzhe Du (11955738) Samir Boulfrad (17823419) Shoufu Yu (19239616) Lei Bi (1944472) Qinfang Zhang (5491889) |
| dc.date.none.fl_str_mv | 2024-03-18T12:00:00Z |
| dc.identifier.none.fl_str_mv | 10.26599/jac.2024.9220880 |
| dc.relation.none.fl_str_mv | https://figshare.com/articles/journal_contribution/Manipulating_Nb-doped_SrFeO_sub_3_sub_sub_em_em_sub_with_excellent_performance_for_proton-conducting_solid_oxide_fuel_cells/26392867 |
| dc.rights.none.fl_str_mv | CC BY 4.0 info:eu-repo/semantics/openAccess |
| dc.subject.none.fl_str_mv | Engineering Materials engineering SrFeO3−δ (SFO) cathode proton conductor solid oxide fuel cells (SOFCs) |
| dc.title.none.fl_str_mv | Manipulating Nb-doped SrFeO <sub>3− </sub><sub><em>δ </em></sub>with excellent performance for proton-conducting solid oxide fuel cells |
| dc.type.none.fl_str_mv | Text Journal contribution info:eu-repo/semantics/publishedVersion text contribution to journal |
| description | <p dir="ltr">Nb-doped SrFeO<sub>3−</sub><sub><em>δ</em></sub> (SFO) is used as a cathode in proton-conducting solid oxide fuel cells (H-SOFCs). First-principles calculations show that the SrFe<sub>0.9</sub>Nb<sub>0.1</sub>O<sub>3−</sub><sub><em>δ</em></sub> (SFNO) cathode has a lower energy barrier in the cathode reaction for H-SOFCs than the Nb-free SrFeO<sub>3−</sub><sub><em>δ</em></sub> cathode. Subsequent experimental studies show that Nb doping substantially enhances the performance of the SrFeO<sub>3−</sub><sub><em>δ</em></sub> cathode. Then, oxygen vacancies (V<sub>O</sub>) were introduced into SFNO using the microwave sintering method, further improving the performance of the SFNO cathode. The mechanism behind the performance improvement owing to V<sub>O</sub> was revealed using first-principles calculations, with further optimization of the SFNO cathode achieved by developing a suitable wet chemical synthesis route to prepare nanosized SFNO materials. This method significantly reduces the grain size of SFNO compared with the conventional solid-state reaction method, although the solid-state reaction method is generally used for preparing Nb-containing oxides. As a result of defect engineering and synthesis approaches, the SFNO cathode achieved an attractive fuel cell performance, attaining an output of 1764 mW·cm<sup>−2</sup> at 700 °C and operating for more than 200 h. The manipulation of Nb-doped SrFeO<sub>3−</sub><sub><em>δ</em></sub> can be seen as a “one stone, two birds” strategy, enhancing cathode performance while retaining good stability, thus providing an interesting approach for constructing high-performance cathodes for H-SOFCs.</p><h2>Other Information</h2><p dir="ltr">Published in: Journal of Advanced Ceramics<br>License: <a href="https://creativecommons.org/licenses/by/4.0" target="_blank">https://creativecommons.org/licenses/by/4.0</a><br>See article on publisher's website: <a href="https://dx.doi.org/10.26599/jac.2024.9220880" target="_blank">https://dx.doi.org/10.26599/jac.2024.9220880</a></p> |
| eu_rights_str_mv | openAccess |
| id | Manara2_b969d99d34c21258577acc5de51d0e30 |
| identifier_str_mv | 10.26599/jac.2024.9220880 |
| network_acronym_str | Manara2 |
| network_name_str | Manara2 |
| oai_identifier_str | oai:figshare.com:article/26392867 |
| publishDate | 2024 |
| repository.mail.fl_str_mv | |
| repository.name.fl_str_mv | |
| repository_id_str | |
| rights_invalid_str_mv | CC BY 4.0 |
| spelling | Manipulating Nb-doped SrFeO <sub>3− </sub><sub><em>δ </em></sub>with excellent performance for proton-conducting solid oxide fuel cellsHailu Dai (19239613)Hongzhe Du (11955738)Samir Boulfrad (17823419)Shoufu Yu (19239616)Lei Bi (1944472)Qinfang Zhang (5491889)EngineeringMaterials engineeringSrFeO3−δ (SFO)cathodeproton conductorsolid oxide fuel cells (SOFCs)<p dir="ltr">Nb-doped SrFeO<sub>3−</sub><sub><em>δ</em></sub> (SFO) is used as a cathode in proton-conducting solid oxide fuel cells (H-SOFCs). First-principles calculations show that the SrFe<sub>0.9</sub>Nb<sub>0.1</sub>O<sub>3−</sub><sub><em>δ</em></sub> (SFNO) cathode has a lower energy barrier in the cathode reaction for H-SOFCs than the Nb-free SrFeO<sub>3−</sub><sub><em>δ</em></sub> cathode. Subsequent experimental studies show that Nb doping substantially enhances the performance of the SrFeO<sub>3−</sub><sub><em>δ</em></sub> cathode. Then, oxygen vacancies (V<sub>O</sub>) were introduced into SFNO using the microwave sintering method, further improving the performance of the SFNO cathode. The mechanism behind the performance improvement owing to V<sub>O</sub> was revealed using first-principles calculations, with further optimization of the SFNO cathode achieved by developing a suitable wet chemical synthesis route to prepare nanosized SFNO materials. This method significantly reduces the grain size of SFNO compared with the conventional solid-state reaction method, although the solid-state reaction method is generally used for preparing Nb-containing oxides. As a result of defect engineering and synthesis approaches, the SFNO cathode achieved an attractive fuel cell performance, attaining an output of 1764 mW·cm<sup>−2</sup> at 700 °C and operating for more than 200 h. The manipulation of Nb-doped SrFeO<sub>3−</sub><sub><em>δ</em></sub> can be seen as a “one stone, two birds” strategy, enhancing cathode performance while retaining good stability, thus providing an interesting approach for constructing high-performance cathodes for H-SOFCs.</p><h2>Other Information</h2><p dir="ltr">Published in: Journal of Advanced Ceramics<br>License: <a href="https://creativecommons.org/licenses/by/4.0" target="_blank">https://creativecommons.org/licenses/by/4.0</a><br>See article on publisher's website: <a href="https://dx.doi.org/10.26599/jac.2024.9220880" target="_blank">https://dx.doi.org/10.26599/jac.2024.9220880</a></p>2024-03-18T12:00:00ZTextJournal contributioninfo:eu-repo/semantics/publishedVersiontextcontribution to journal10.26599/jac.2024.9220880https://figshare.com/articles/journal_contribution/Manipulating_Nb-doped_SrFeO_sub_3_sub_sub_em_em_sub_with_excellent_performance_for_proton-conducting_solid_oxide_fuel_cells/26392867CC BY 4.0info:eu-repo/semantics/openAccessoai:figshare.com:article/263928672024-03-18T12:00:00Z |
| spellingShingle | Manipulating Nb-doped SrFeO <sub>3− </sub><sub><em>δ </em></sub>with excellent performance for proton-conducting solid oxide fuel cells Hailu Dai (19239613) Engineering Materials engineering SrFeO3−δ (SFO) cathode proton conductor solid oxide fuel cells (SOFCs) |
| status_str | publishedVersion |
| title | Manipulating Nb-doped SrFeO <sub>3− </sub><sub><em>δ </em></sub>with excellent performance for proton-conducting solid oxide fuel cells |
| title_full | Manipulating Nb-doped SrFeO <sub>3− </sub><sub><em>δ </em></sub>with excellent performance for proton-conducting solid oxide fuel cells |
| title_fullStr | Manipulating Nb-doped SrFeO <sub>3− </sub><sub><em>δ </em></sub>with excellent performance for proton-conducting solid oxide fuel cells |
| title_full_unstemmed | Manipulating Nb-doped SrFeO <sub>3− </sub><sub><em>δ </em></sub>with excellent performance for proton-conducting solid oxide fuel cells |
| title_short | Manipulating Nb-doped SrFeO <sub>3− </sub><sub><em>δ </em></sub>with excellent performance for proton-conducting solid oxide fuel cells |
| title_sort | Manipulating Nb-doped SrFeO <sub>3− </sub><sub><em>δ </em></sub>with excellent performance for proton-conducting solid oxide fuel cells |
| topic | Engineering Materials engineering SrFeO3−δ (SFO) cathode proton conductor solid oxide fuel cells (SOFCs) |