Evaluation and optimization of Bi1−xSrxFeO3−δ perovskites as cathodes of solid oxide fuel cells
Article
Article Title | Evaluation and optimization of Bi1−xSrxFeO3−δ perovskites as cathodes of solid oxide fuel cells |
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ERA Journal ID | 1184 |
Article Category | Article |
Authors | Niu, Yingjie (Author), Sunarso, Jaka (Author), Zhou, Wei (Author), Liang, Fengli (Author), Ge, Lei (Author), Zhu, Zhonghua (Author) and Shao, Zongping (Author) |
Journal Title | International Journal of Hydrogen Energy |
Journal Citation | 36 (4), pp. 3179-3186 |
Number of Pages | 8 |
Year | 2011 |
Publisher | Elsevier |
Place of Publication | United Kingdom |
ISSN | 0360-3199 |
1879-3487 | |
Digital Object Identifier (DOI) | https://doi.org/10.1016/j.ijhydene.2010.11.109 |
Web Address (URL) | http://www.sciencedirect.com/science/article/pii/S0360319910023244 |
Abstract | Lattice expansion behaviour, oxygen nonstoichiometry, mean iron oxidation state, electrical conductivity and interfacial polarization resistance of Bi1-xSrxFeO3-δ were reported as a function of Sr-doping content for x = 0.3, 0.5 and 0.8. Among the series, Bi0.5Sr0.5FeO3-δ (BSF5) demonstrates the optimum performance in terms of the lowest interfacial polarization resistance and the largest oxygen nonstoichiometry. It is demonstrated that the best microstructure and the lowest interfacial resistance can be obtained by firing BSF5 onto dense Sm0.2Ce0.8O1.9 (SDC) electrolyte at 1000°C. BSF5 exhibits good chemical compatibility with SDC; however, firing temperature above 1000 °C results in the formation of bismuth-deficient perovskite with inferior activity for oxygen reduction reaction. We also show that single-phase BSF5 cathode provides better electrode performance than its composite with SDC. This is due to the increased charge-transfer resistance upon adding SDC which have negligible electronic conductivity. |
Keywords | charge transfer resistance; chemical compatibility; electrical conductivity; electrode performance; electronic conductivity; firing temperature; interfacial polarization resistance; interfacial resistances; iron oxidation state; lattice expansion; optimum performance; oxygen non-stoichiometry; oxygen reduction reaction; Sr-doping content; cerium; charge transfer; electric conductivity; electrolytic reduction; gas fuel purification; iron oxides; oxygen; perovskite; polarization; solid oxide fuel cells (SOFC); bismuth |
ANZSRC Field of Research 2020 | 401601. Ceramics |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | Nanjing University of Technology, China |
University of Queensland | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q3z57/evaluation-and-optimization-of-bi1-xsrxfeo3-perovskites-as-cathodes-of-solid-oxide-fuel-cells
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