Entropy engineering design of high-performing lithiated oxide cathodes for proton-conducting solid oxide fuel cells
A new medium entropy material LiCo0.25Fe0.25Mn0.25Ni0.25O2 (LCFMN) is proposed as a cathode for proton-conducting solid oxide fuel cells (H-SOFCs). Unlike traditional LiXO2 (X = Co, Fe, Mn, Ni) lithiated oxides, which have issues like phase impurity, poor chemical compatibility, or poor fuel cell pe...
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| Format: | Article |
| Language: | English |
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Tsinghua University Press
2023-11-01
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| Series: | Journal of Advanced Ceramics |
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| Online Access: | https://www.sciopen.com/article/10.26599/JAC.2023.9220804 |
| _version_ | 1827578420974845952 |
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| author | Yufeng Li Yangsen Xu Yanru Yin Hailu Dai Yueyuan Gu Lei Bi |
| author_facet | Yufeng Li Yangsen Xu Yanru Yin Hailu Dai Yueyuan Gu Lei Bi |
| author_sort | Yufeng Li |
| collection | DOAJ |
| description | A new medium entropy material LiCo0.25Fe0.25Mn0.25Ni0.25O2 (LCFMN) is proposed as a cathode for proton-conducting solid oxide fuel cells (H-SOFCs). Unlike traditional LiXO2 (X = Co, Fe, Mn, Ni) lithiated oxides, which have issues like phase impurity, poor chemical compatibility, or poor fuel cell performance, the new LCFMN material mitigates these problems, allowing for the successful preparation of pure phase LCFMN with good chemical and thermal compatibility to the electrolyte. Furthermore, the entropy engineering strategy is found to weaken the covalence bond between the metal and oxygen in the LCFMN lattice, favoring the creation of oxygen vacancies and increasing cathode activity. As a result, the H-SOFC with the LCFMN cathode achieves an unprecedented fuel cell output of 1803 mW·cm−2 at 700 ℃, the highest ever reported for H-SOFCs with lithiated oxide cathodes. In addition to high fuel cell performance, the LCFMN cathode permits stable fuel cell operation for more than 450 h without visible degradation, demonstrating that LCFMN is a suitable cathode choice for H-SOFCs that combining high performance and good stability. |
| first_indexed | 2024-03-08T21:46:18Z |
| format | Article |
| id | doaj.art-b587302d50084c50bc1400a6548f4be7 |
| institution | Directory Open Access Journal |
| issn | 2226-4108 2227-8508 |
| language | English |
| last_indexed | 2024-03-08T21:46:18Z |
| publishDate | 2023-11-01 |
| publisher | Tsinghua University Press |
| record_format | Article |
| series | Journal of Advanced Ceramics |
| spelling | doaj.art-b587302d50084c50bc1400a6548f4be72023-12-20T09:05:49ZengTsinghua University PressJournal of Advanced Ceramics2226-41082227-85082023-11-0112112017203110.26599/JAC.2023.9220804Entropy engineering design of high-performing lithiated oxide cathodes for proton-conducting solid oxide fuel cellsYufeng Li0Yangsen Xu1Yanru Yin2Hailu Dai3Yueyuan Gu4Lei Bi5School of Resource Environment and Safety Engineering, University of South China, Hengyang 421001, ChinaSchool of Resource Environment and Safety Engineering, University of South China, Hengyang 421001, ChinaSchool of Resource Environment and Safety Engineering, University of South China, Hengyang 421001, ChinaSchool of Materials Science and Engineering, Yancheng Institute of Technology, Yancheng 224051, ChinaSchool of Resource Environment and Safety Engineering, University of South China, Hengyang 421001, ChinaSchool of Resource Environment and Safety Engineering, University of South China, Hengyang 421001, ChinaA new medium entropy material LiCo0.25Fe0.25Mn0.25Ni0.25O2 (LCFMN) is proposed as a cathode for proton-conducting solid oxide fuel cells (H-SOFCs). Unlike traditional LiXO2 (X = Co, Fe, Mn, Ni) lithiated oxides, which have issues like phase impurity, poor chemical compatibility, or poor fuel cell performance, the new LCFMN material mitigates these problems, allowing for the successful preparation of pure phase LCFMN with good chemical and thermal compatibility to the electrolyte. Furthermore, the entropy engineering strategy is found to weaken the covalence bond between the metal and oxygen in the LCFMN lattice, favoring the creation of oxygen vacancies and increasing cathode activity. As a result, the H-SOFC with the LCFMN cathode achieves an unprecedented fuel cell output of 1803 mW·cm−2 at 700 ℃, the highest ever reported for H-SOFCs with lithiated oxide cathodes. In addition to high fuel cell performance, the LCFMN cathode permits stable fuel cell operation for more than 450 h without visible degradation, demonstrating that LCFMN is a suitable cathode choice for H-SOFCs that combining high performance and good stability.https://www.sciopen.com/article/10.26599/JAC.2023.9220804entropy designlico0.25fe0.25mn0.25ni0.25o2 (lcfmn)cathodeproton conductorsolid oxide fuel cells (sofcs) |
| spellingShingle | Yufeng Li Yangsen Xu Yanru Yin Hailu Dai Yueyuan Gu Lei Bi Entropy engineering design of high-performing lithiated oxide cathodes for proton-conducting solid oxide fuel cells Journal of Advanced Ceramics entropy design lico0.25fe0.25mn0.25ni0.25o2 (lcfmn) cathode proton conductor solid oxide fuel cells (sofcs) |
| title | Entropy engineering design of high-performing lithiated oxide cathodes for proton-conducting solid oxide fuel cells |
| title_full | Entropy engineering design of high-performing lithiated oxide cathodes for proton-conducting solid oxide fuel cells |
| title_fullStr | Entropy engineering design of high-performing lithiated oxide cathodes for proton-conducting solid oxide fuel cells |
| title_full_unstemmed | Entropy engineering design of high-performing lithiated oxide cathodes for proton-conducting solid oxide fuel cells |
| title_short | Entropy engineering design of high-performing lithiated oxide cathodes for proton-conducting solid oxide fuel cells |
| title_sort | entropy engineering design of high performing lithiated oxide cathodes for proton conducting solid oxide fuel cells |
| topic | entropy design lico0.25fe0.25mn0.25ni0.25o2 (lcfmn) cathode proton conductor solid oxide fuel cells (sofcs) |
| url | https://www.sciopen.com/article/10.26599/JAC.2023.9220804 |
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