Study on La and Y co-doped ceria-based electrolyte materials

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	Study on La and Y co-doped ceria-based electrolyte materials
	X. Q. Sha ; Z. Lu ; X. Q. Huang ; J. P. Miao ; Z. H. Ding ; X. S. Xin ; W. H. Su
刊名	Journal of Alloys and Compounds
	2007
卷号	428 期号:1-2 页码:59-64
关键词	SOFC co-doped ceria electrolyte oxide fuel-cells ionic-conductivity solid-solutions gd temperature pr tb eu
ISSN号	0925-8388
中文摘要	Co-doped ceria electrolytes of Ce0.8La0.2-xYxO1.9 (x = 0.02, 0.06, 0.10, 0.14, 0.20) fine powders were prepared with the sol-gel method. The results of X-ray diffraction and Raman spectroscopy showed that all powders crystallite calcined at 800 degrees C were single phase with cubic fluorite structure, the average crystallite sizes calculated by the Scherrer formula were between 27 and 34 nm, which was in good agreement with the results of TEM and particle size distribution measurements. The thermal expansion curves of Ce0.8La0.2-xYxO1.9 were measured and the thermal expansion coefficients (TEC) between 100 and 800 degrees C were calculated. For the samples of Ce0.8La0.2-xYxO1.9, in the temperature range of 700-850 degrees C, when x = 0.06, 0.10 and 0.14, much higher ionic conductivity was observed than those of the singly doped ceria with same dopant concentration (20% trivalent rare earth) and when x = 0.06, maximal conductivity is obtained. It suggested that co-doping with appropriate ratio of lanthanum and yttrium can further improve the electrical performance of ceria-based electrolytes, and these co-doped samples may be the better electrolytes for intermediate-temperature solid oxide fuel cells. (c) 2006 Elsevier B.V. All rights reserved.
原文出处	://WOS:000243736200012
公开日期	2012-04-13
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/33798]
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	X. Q. Sha,Z. Lu,X. Q. Huang,et al. Study on La and Y co-doped ceria-based electrolyte materials[J]. Journal of Alloys and Compounds,2007,428(1-2):59-64.
APA	X. Q. Sha.,Z. Lu.,X. Q. Huang.,J. P. Miao.,Z. H. Ding.,...&W. H. Su.(2007).Study on La and Y co-doped ceria-based electrolyte materials.Journal of Alloys and Compounds,428(1-2),59-64.
MLA	X. Q. Sha,et al."Study on La and Y co-doped ceria-based electrolyte materials".Journal of Alloys and Compounds 428.1-2(2007):59-64.