GdBaCo2O5+delta-Sm0.2Ce0.8O1.9 composite cathodes for intermediate temperature SOFCs
Li, Na1; Wei, Bo1; Lue, Zhe1; Huang, Xiqiang1; Su, Wenhui1,2
Corresponding AuthorWei, Bo(
AbstractThe GdBaCo2O5+delta-Sm0.2Ce0.8O1.9 (GBCO-SDC) composite cathodes were prepared, their thermogravimetric measurement, thermal expansion coefficient (TEC), electrical conductivity and electrochemical performance were studied as function of temperature and SDC content. The adjustment of TEC to electrolyte, which is one of the main problems of GBCO cathode, could be achieved to lower TEC values with more SDC addition, while maintaining reasonable high electrical conductivity. By means of DC polarization and AC impedance spectroscopy, the electrochemical performance of GBCO-SDC composite cathodes on SDC electrolyte was examined. Results indicated that the proper addition of SDC could improve the performance of GBCO cathode. The optimum content of SDC in the composite cathodes was 40 wt.% with the polarization resistance (Rp) of 1.39 Omega cm(2) at 500 degrees C, which was significantly lower than that of pure GBCO cathode (7.26 Omega cm(2)). (C) 2010 Elsevier B.V. All rights reserved.
KeywordIntermediate-temperature SOFC Composite cathodes GdBaCo2O5+delta Thermal expansion Electrochemical performance
Funding OrganizationNatural Science Foundation of China ; Ministry of Science and Technology of China
Indexed BySCI
Funding ProjectNatural Science Foundation of China[20901020] ; Ministry of Science and Technology of China[2007AA05Z139]
WOS Research AreaChemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectChemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000287570200041
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Cited Times:22[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorWei, Bo
Affiliation1.Harbin Inst Technol, Dept Phys, Ctr Condensed Matter Sci & Technol, Harbin 150080, Peoples R China
2.Acad Sinica, Int Ctr Mat Phys, Shenyang 110015, Peoples R China
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Li, Na,Wei, Bo,Lue, Zhe,et al. GdBaCo2O5+delta-Sm0.2Ce0.8O1.9 composite cathodes for intermediate temperature SOFCs[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2011,509(8):3651-3655.
APA Li, Na,Wei, Bo,Lue, Zhe,Huang, Xiqiang,&Su, Wenhui.(2011).GdBaCo2O5+delta-Sm0.2Ce0.8O1.9 composite cathodes for intermediate temperature SOFCs.JOURNAL OF ALLOYS AND COMPOUNDS,509(8),3651-3655.
MLA Li, Na,et al."GdBaCo2O5+delta-Sm0.2Ce0.8O1.9 composite cathodes for intermediate temperature SOFCs".JOURNAL OF ALLOYS AND COMPOUNDS 509.8(2011):3651-3655.
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