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La3+-substituted Sr2Fe1.5Ni0.1Mo0.4O6-delta as Anodes for Solid Oxide Fuel Cells
Xia, T; Meng, X; Luo, T; Zhan, ZL
2020-05-20
Source PublicationJOURNAL OF INORGANIC MATERIALS
ISSN1000-324X
Issue5Pages:617
SubtypeArticle
AbstractLanthanum-substituted LaxSr2-3x/2Fe1.5Ni0.1Mo0.4O6-delta (LaxSFNM, x=0, 0.1, 0.2, 0.3, 0.4) oxides were synthesized by the solid-state reaction method, and investigated as potential anodes for Solid Oxide Fuel Cells(SOFC). X-ray diffraction patterns of as-synthesized powders confirm the formation of the cubic perovskite structure. Reduction in H-2 promotes the segregation of nano-scale metallic Fe-Ni alloy particles on the grain surfaces. Scanning electron microscopy observations indicate that increasing La3+ dopants results in a decrease in the density of the exsolved nanoparticulates. Based upon impedance measurements on symmetrical fuel cells, the anode polarization resistance decreases with the La3+ dopant increasing, and attains a minimal value of 0.16 Omega.cm(2) for La0.3SFNM at 750 degrees C, followed by a slight increase to 0.17 Omega.cm(2) for La0.4SFNM. The highest catalytic activity of La0.3SFNM toward electro-oxidation of hydrogen fuels could be ascribed to the synergy between the exsolved Fe-Ni alloy nanoparticulates and the supporting LaxSFNM oxides. Thin La0.9Sr0.1Ga0.8Mg0.2O3 (LSGM) electrolyte fuel cells with La0.3SFNM anodes and SmBa0.5Sr0.5Co2O6 cathodes exhibit the highest power densities, e.g., 1.26, 0.90 and 0.52 W.cm(-2 )at 750, 650 and 550 degrees C, respectively. These results demonstrate La0.3SFNM oxide as a promising high performance SOFC anode.
DOI10.15541/jim20190225
WOS KeywordPEROVSKITE OXIDE ; HIGH-PERFORMANCE ; CATHODES ; SR2FE1.5MO0.5O6-DELTA
Language英语
WOS Research AreaMaterials Science
PublisherSCIENCE PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/28052
Collection中国科学院上海硅酸盐研究所
Recommended Citation
GB/T 7714
Xia, T,Meng, X,Luo, T,et al. La3+-substituted Sr2Fe1.5Ni0.1Mo0.4O6-delta as Anodes for Solid Oxide Fuel Cells[J]. JOURNAL OF INORGANIC MATERIALS,2020(5):617.
APA Xia, T,Meng, X,Luo, T,&Zhan, ZL.(2020).La3+-substituted Sr2Fe1.5Ni0.1Mo0.4O6-delta as Anodes for Solid Oxide Fuel Cells.JOURNAL OF INORGANIC MATERIALS(5),617.
MLA Xia, T,et al."La3+-substituted Sr2Fe1.5Ni0.1Mo0.4O6-delta as Anodes for Solid Oxide Fuel Cells".JOURNAL OF INORGANIC MATERIALS .5(2020):617.
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