Effect of TiO2 as an additive on the sintering performance of Sm-doped CeO2-based electrolyte for solid oxide fuel cells
In this work, TiO2 was selected as an additive to the Sm0.2Ce0.8O2-δ (SDC) electrolyte and its influence on the electrolyte properties were investigated. The tetrabutyl titanate hydrolysis product was introduced into the SDC samples as a source of TiO2. The lattice contraction of SDC was observed by...
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| Format: | Article |
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Frontiers Media S.A.
2022-10-01
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| Series: | Frontiers in Chemistry |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fchem.2022.1034993/full |
| _version_ | 1817967992208621568 |
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| author | Xuzhuo Sun Shuailei Deng Yunyun Xia Bo Li Ye Tian Jing Chen |
| author_facet | Xuzhuo Sun Shuailei Deng Yunyun Xia Bo Li Ye Tian Jing Chen |
| author_sort | Xuzhuo Sun |
| collection | DOAJ |
| description | In this work, TiO2 was selected as an additive to the Sm0.2Ce0.8O2-δ (SDC) electrolyte and its influence on the electrolyte properties were investigated. The tetrabutyl titanate hydrolysis product was introduced into the SDC samples as a source of TiO2. The lattice contraction of SDC was observed by XRD when the smaller ionic radius Ti4+ (0.605Å) were substituted for Ce4+ (0.97 Å). XRD analysis shows that the doping content of the TiO2 in SDC should be limited to 1 wt% to maintain the single-phase cubic fluorite structure of the SDC and avoid impurity phases. SEM characterizations suggest that the addition of TiO2 significantly promoted the grain growth and the sintering activity, especially when doping with 0.5 wt% of TiO2. The electrochemical measurements reveal that the addition of TiO2 had little effect on the conductivity of SDC samples, which was 0.0306 S cm−1 at 700°C. This study shows that 0.5 wt% TiO2 doping can effectively improve the sintering activity without reducing the SDC performance. |
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| id | doaj.art-909f80d008d54d48a72d7ec6f74707d9 |
| institution | Directory Open Access Journal |
| issn | 2296-2646 |
| language | English |
| last_indexed | 2024-04-13T20:02:09Z |
| publishDate | 2022-10-01 |
| publisher | Frontiers Media S.A. |
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| series | Frontiers in Chemistry |
| spelling | doaj.art-909f80d008d54d48a72d7ec6f74707d92022-12-22T02:32:09ZengFrontiers Media S.A.Frontiers in Chemistry2296-26462022-10-011010.3389/fchem.2022.10349931034993Effect of TiO2 as an additive on the sintering performance of Sm-doped CeO2-based electrolyte for solid oxide fuel cellsXuzhuo Sun0Shuailei Deng1Yunyun Xia2Bo Li3Ye Tian4Jing Chen5School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou, ChinaSchool of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou, ChinaSchool of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou, ChinaSchool of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou, ChinaSchool of Mechanical and Electrical Engineering, Henan University of Technology, Zhengzhou, ChinaSchool of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou, ChinaIn this work, TiO2 was selected as an additive to the Sm0.2Ce0.8O2-δ (SDC) electrolyte and its influence on the electrolyte properties were investigated. The tetrabutyl titanate hydrolysis product was introduced into the SDC samples as a source of TiO2. The lattice contraction of SDC was observed by XRD when the smaller ionic radius Ti4+ (0.605Å) were substituted for Ce4+ (0.97 Å). XRD analysis shows that the doping content of the TiO2 in SDC should be limited to 1 wt% to maintain the single-phase cubic fluorite structure of the SDC and avoid impurity phases. SEM characterizations suggest that the addition of TiO2 significantly promoted the grain growth and the sintering activity, especially when doping with 0.5 wt% of TiO2. The electrochemical measurements reveal that the addition of TiO2 had little effect on the conductivity of SDC samples, which was 0.0306 S cm−1 at 700°C. This study shows that 0.5 wt% TiO2 doping can effectively improve the sintering activity without reducing the SDC performance.https://www.frontiersin.org/articles/10.3389/fchem.2022.1034993/fullsolid oxide fuel cellSm-doped CeO2grain boundaryTPBelectrolyte |
| spellingShingle | Xuzhuo Sun Shuailei Deng Yunyun Xia Bo Li Ye Tian Jing Chen Effect of TiO2 as an additive on the sintering performance of Sm-doped CeO2-based electrolyte for solid oxide fuel cells Frontiers in Chemistry solid oxide fuel cell Sm-doped CeO2 grain boundary TPB electrolyte |
| title | Effect of TiO2 as an additive on the sintering performance of Sm-doped CeO2-based electrolyte for solid oxide fuel cells |
| title_full | Effect of TiO2 as an additive on the sintering performance of Sm-doped CeO2-based electrolyte for solid oxide fuel cells |
| title_fullStr | Effect of TiO2 as an additive on the sintering performance of Sm-doped CeO2-based electrolyte for solid oxide fuel cells |
| title_full_unstemmed | Effect of TiO2 as an additive on the sintering performance of Sm-doped CeO2-based electrolyte for solid oxide fuel cells |
| title_short | Effect of TiO2 as an additive on the sintering performance of Sm-doped CeO2-based electrolyte for solid oxide fuel cells |
| title_sort | effect of tio2 as an additive on the sintering performance of sm doped ceo2 based electrolyte for solid oxide fuel cells |
| topic | solid oxide fuel cell Sm-doped CeO2 grain boundary TPB electrolyte |
| url | https://www.frontiersin.org/articles/10.3389/fchem.2022.1034993/full |
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