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	Electrical properties of ceria Co-doped with Sm3+ and Nd3+
	Li, Bin ; Liu, Yanyi ; Wei, Xi ; Pan, Wei
	2010-10-12 ; 2010-10-12
关键词	Co-doping Ceria Solid oxide fuel cells Activation energy Segregation GRAIN-BOUNDARY CONDUCTIVITY ENHANCED IONIC-CONDUCTIVITY LATTICE-PARAMETERS CERAMICS ELECTROLYTES OXIDE CE0.8SM0.2O1.9 TEMPERATURE ZIRCONIA SYSTEM Electrochemistry Energy & Fuels
中文摘要	Ceria co-doped with Sm3+ and Nd3+ powders are successfully synthesized by citric acid-nitrate low-temperature combustion process. In order to optimize the electrical properties of the series of ceria co-doped with Sm3+ and Nd3+, the effects of co-doping, doping content and sintering conditions on grain and grain boundary conductivity are investigated in detail. For the series of Ce-0.9(SmxNd1-x)(0.1)O-1.95 (x=0, 0.5, 1) and Ce1-x(Sm0.5Nd0.5)(x)O-delta (x=0.05, 0.10, 0.15, 0.20) sintered under the same condition, Ce-0.9(Sm0.5Nd0.5)(0.1)O-1.95 exhibits both higher grain and grain boundary conductivity. Compared with Ce0.9Gd0.1O1.95 and Ce0.8Sm0.2O1.9, Ce-0.9(Sm0.5Nd0.5)(0.1)O-1.95 sintered at 1350-1400 degrees C shows higher total conductivity with the value of 1.0 x 10(-2) S cm(-1) at 550 degrees C. In addition, it can be found the trends of grain and grain boundary activation energies of Ce1-x(Sm0.5Nd0.5)(x)O-delta are both consistent with those of Ce1-xNdxO delta, but different from those of Ce1-xSmxO delta, which can be explained as: the local ordering of oxygen vacancies maybe occurs more easily in Nd-doped ceria than in Sm-doped ceria: the segregation amount of Sm3+ is more than that of Nd3+ to the grain boundaries in ceria co-doped with Sm3+ and Nd3+, which is confirmed by X-ray photoelectron spectroscopy (XPS). (C) 2009 Elsevier B.V. All rights reserved.
语种	英语 ; 英语
出版者	ELSEVIER SCIENCE BV ; AMSTERDAM ; PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/78121]
专题	清华大学
推荐引用方式 GB/T 7714	Li, Bin,Liu, Yanyi,Wei, Xi,et al. Electrical properties of ceria Co-doped with Sm3+ and Nd3+[J],2010, 2010.
APA	Li, Bin,Liu, Yanyi,Wei, Xi,&Pan, Wei.(2010).Electrical properties of ceria Co-doped with Sm3+ and Nd3+..
MLA	Li, Bin,et al."Electrical properties of ceria Co-doped with Sm3+ and Nd3+".(2010).

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