Study on Ba-0.5 Sr0.5Co0.8Fe0.2O3-delta-Sm0.5Sr0.5CoO3-delta composite cathode materials for IT-SOFCs

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	Study on Ba-0.5 Sr0.5Co0.8Fe0.2O3-delta-Sm0.5Sr0.5CoO3-delta composite cathode materials for IT-SOFCs
	W. X. Zhu ; Z. Lu ; S. Y. Li ; B. Wei ; J. P. Miao ; X. Q. Huang ; K. F. Chen ; N. Ai ; W. H. Su
刊名	Journal of Alloys and Compounds
	2008
卷号	465 期号:1-2 页码:274-279
关键词	Composite materials X-ray diffraction Thermal analysis Ionic conduction Electronic transport oxide fuel-cells electrochemical performance thermal-expansion temperature perovskite sm0.5sr0.5coo3 transport stability membrane behavior
ISSN号	0925-8388
中文摘要	Ba0.5Sr0.5Co0.8Fe0.2O3-delta-xSm(0.5)Sr(0.5)CoO(3-delta) (BSCF-xSSC, x=0-40wt%) composite cathodes supported on Sm0.2Ce0.8O1.9 (SDC) electrolyte were studied for applications in IT-SOFCs. X-ray diffraction patterns showed obvious solid-state reactions between BSCF and SSC. However, the composite materials exhibited higher conductivity than that of pure BSCF, e.g., around 176 S cm(-1) at 500 degrees C for the x= 30 wt% composite, which was nearly seven times higher than that of BSCF. The thermal expansion coefficients of the BSCF-SSC were between (18.0 and 21.9) x 10(-6) K-1 from 30 to 800 degrees C, which was slightly higher than that of BSCF. In addition, electrochemical impedance spectra exhibited the better performance of BSCF-SSC composite cathodes than pure BSCF. The results of the polarization resistance indicated that the optimum content of SSC in the composite cathodes was about 30 wt%, e.g., the polarization resistance value of BSCF-30 wt%SSC was only 0.71 Omega cm(2) at 550 degrees C, about one seventh of that BSCF at 550 degrees C. (C) 2007 Elsevier B.V. All rights reserved.
原文出处	://WOS:000259980000050
公开日期	2012-04-13
内容类型	期刊论文
源URL	[http://210.72.142.130/handle/321006/33412]
专题	金属研究所_中国科学院金属研究所
推荐引用方式 GB/T 7714	W. X. Zhu,Z. Lu,S. Y. Li,et al. Study on Ba-0.5 Sr0.5Co0.8Fe0.2O3-delta-Sm0.5Sr0.5CoO3-delta composite cathode materials for IT-SOFCs[J]. Journal of Alloys and Compounds,2008,465(1-2):274-279.
APA	W. X. Zhu.,Z. Lu.,S. Y. Li.,B. Wei.,J. P. Miao.,...&W. H. Su.(2008).Study on Ba-0.5 Sr0.5Co0.8Fe0.2O3-delta-Sm0.5Sr0.5CoO3-delta composite cathode materials for IT-SOFCs.Journal of Alloys and Compounds,465(1-2),274-279.
MLA	W. X. Zhu,et al."Study on Ba-0.5 Sr0.5Co0.8Fe0.2O3-delta-Sm0.5Sr0.5CoO3-delta composite cathode materials for IT-SOFCs".Journal of Alloys and Compounds 465.1-2(2008):274-279.