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	Preparation and properties of Gd3+ and Y3+ co-doped ceria-based electrolytes for intermediate temperature solid oxide fuel cells
	Guan, Xiangfeng ; Zhou, Heping ; Wang, Yanan ; Zhang, Jun
	2010-05-10 ; 2010-05-10
关键词	ceramics ionic conduction microstructure X-ray diffraction LATTICE-PARAMETERS IONIC-CONDUCTIVITY ELECTROCHEMICAL PROPERTIES ELECTRICAL-CONDUCTIVITY CRYSTAL-STRUCTURE SOFC COMBUSTION IMPEDANCE POWDERS SM Chemistry, Physical Materials Science, Multidisciplinary Metallurgy & Metallurgical Engineering
中文摘要	Co-doped ceria electrolytes of Ce0.8Gd0.2-xYxO1.9 (x = 0.0-0.20) fine powders were prepared with glycine-nitrate method. The results of X-ray diffraction showed that all powders crystallite calcined at 873 K were single phase with Cubic fluorite Structure. The average crystallite sizes calculated by the Scherrer formula were between 21 and 23 Inn, which was in good agreement with the results of TEM and particle size distribution measurements. The thermal expansion curves of Ce0.8Gd0.2-xYxO1.9 were measured and the thermal expansion coefficients between 373 and 1123 K were calculated. The SEM results exhibited that electrolyte pellets sintered at 1523 K were dense, and the relative densities of these pellets were over 96%. The impedance spectra analysis of these electrolytes has been performed at 623-1023 K. The results showed that co-doped ceria exhibited hi-her ionic conductivity and lower activation energy than the singly doped ceria with the same dopant concentration at the temperature range of 773-1023 K, and the electrolytic domain boundary of co-doped ceria was smaller than that of singly doped ceria at 873-973 K. It suggested that co-doping with appropriate ratio gadolinium and yttrium Could further improve the electrochemical performance of ceria-based electrolytes. These co-doped samples are ideal electrolyte materials of intermediate temperature solid oxide fuel cells. (C) 2007 Elsevier B.V. All rights reserved.
语种	英语 ; 英语
出版者	ELSEVIER SCIENCE SA ; LAUSANNE ; PO BOX 564, 1001 LAUSANNE, SWITZERLAND
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/21647]
专题	清华大学
推荐引用方式 GB/T 7714	Guan, Xiangfeng,Zhou, Heping,Wang, Yanan,et al. Preparation and properties of Gd3+ and Y3+ co-doped ceria-based electrolytes for intermediate temperature solid oxide fuel cells[J],2010, 2010.
APA	Guan, Xiangfeng,Zhou, Heping,Wang, Yanan,&Zhang, Jun.(2010).Preparation and properties of Gd3+ and Y3+ co-doped ceria-based electrolytes for intermediate temperature solid oxide fuel cells..
MLA	Guan, Xiangfeng,et al."Preparation and properties of Gd3+ and Y3+ co-doped ceria-based electrolytes for intermediate temperature solid oxide fuel cells".(2010).

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