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High performance Gd{sup 3+} and Y{sup 3+} co-doped ceria-based electrolytes for intermediate temperature solid oxide fuel cells

Co-doped ceria of Ce{sub 1-x}Gd{sub x-y}Y{sub y}O{sub 2-0.5x}, wherein x = 0.15 and 0.2, 0 {

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Published in:	Materials research bulletin 2008-04, Vol.43 (4)
Main Authors:	Guan Xiangfeng, Zhou Heping, Liu Zhihui, Wang Yanan, Zhang Jun
Format:	Article
Language:	English
Subjects:	CERIUM OXIDES DOPED MATERIALS ELECTROLYTES ELECTRON MICROSCOPY FLUORITE GADOLINIUM IONS GADOLINIUM OXIDES GLYCINE IMPEDANCE IONIC CONDUCTIVITY MATERIALS SCIENCE NITRATES SOLID OXIDE FUEL CELLS SOLID SOLUTIONS SPECTROSCOPY TEMPERATURE RANGE 0400-1000 K TEMPERATURE RANGE 1000-4000 K X-RAY DIFFRACTION YTTRIUM IONS YTTRIUM OXIDES
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description	Co-doped ceria of Ce{sub 1-x}Gd{sub x-y}Y{sub y}O{sub 2-0.5x}, wherein x = 0.15 and 0.2, 0 {
doi_str_mv	10.1016/j.materresbull.2007.04.027
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Their structures and ionic conductivities were characterized by X-ray diffraction (XRD) and AC impedance spectroscopy (IS). All the electrolytes were found to be ceria-based solid solutions of fluorite type structures. Co-doping was found to effectively enhance the conductivity. In comparison to the singly doped ceria, the co-doped ceria showed much higher ionic conductivities at 673-973 K. At 773 K, the ionic conductivity of Ce{sub 0.8}Gd{sub 0.05}Y{sub 0.15}O{sub 1.9} is 0.013 S cm{sup -1} which is three times as high as that of Ce{sub 0.8}Gd{sub 0.2}O{sub 1.9}. 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Their structures and ionic conductivities were characterized by X-ray diffraction (XRD) and AC impedance spectroscopy (IS). All the electrolytes were found to be ceria-based solid solutions of fluorite type structures. Co-doping was found to effectively enhance the conductivity. In comparison to the singly doped ceria, the co-doped ceria showed much higher ionic conductivities at 673-973 K. At 773 K, the ionic conductivity of Ce{sub 0.8}Gd{sub 0.05}Y{sub 0.15}O{sub 1.9} is 0.013 S cm{sup -1} which is three times as high as that of Ce{sub 0.8}Gd{sub 0.2}O{sub 1.9}. 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Their structures and ionic conductivities were characterized by X-ray diffraction (XRD) and AC impedance spectroscopy (IS). All the electrolytes were found to be ceria-based solid solutions of fluorite type structures. Co-doping was found to effectively enhance the conductivity. In comparison to the singly doped ceria, the co-doped ceria showed much higher ionic conductivities at 673-973 K. At 773 K, the ionic conductivity of Ce{sub 0.8}Gd{sub 0.05}Y{sub 0.15}O{sub 1.9} is 0.013 S cm{sup -1} which is three times as high as that of Ce{sub 0.8}Gd{sub 0.2}O{sub 1.9}. These Gd{sup 3+}and Y{sup 3+} co-doped ceria are ideal electrolyte materials of intermediate temperature solid oxide fuel cells (SOFCs)</abstract><cop>United States</cop><doi>10.1016/j.materresbull.2007.04.027</doi></addata></record>
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subjects	CERIUM OXIDES DOPED MATERIALS ELECTROLYTES ELECTRON MICROSCOPY FLUORITE GADOLINIUM IONS GADOLINIUM OXIDES GLYCINE IMPEDANCE IONIC CONDUCTIVITY MATERIALS SCIENCE NITRATES SOLID OXIDE FUEL CELLS SOLID SOLUTIONS SPECTROSCOPY TEMPERATURE RANGE 0400-1000 K TEMPERATURE RANGE 1000-4000 K X-RAY DIFFRACTION YTTRIUM IONS YTTRIUM OXIDES
title	High performance Gd{sup 3+} and Y{sup 3+} co-doped ceria-based electrolytes for intermediate temperature solid oxide fuel cells
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