Design of high quality doped CeO2 solid electrolytes with nanohetero structure

Mori, T, Drennan, J, Ou, DR and Ye, F (2006) Design of high quality doped CeO2 solid electrolytes with nanohetero structure. Nukleonika, 51 SUPPL. 1: S11-S18.

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Author Mori, T
Drennan, J
Ou, DR
Ye, F
Title Design of high quality doped CeO2 solid electrolytes with nanohetero structure
Journal name Nukleonika   Check publisher's open access policy
ISSN 0029-5922
Publication date 2006
Sub-type Article (original research)
Open Access Status File (Publisher version)
Volume 51
Issue SUPPL. 1
Start page S11
End page S18
Total pages 8
Place of publication Warsaw, Poland
Publisher Institute of Nuclear Chemistry Technology
Collection year 2006
Language eng
Subject C1
780102 Physical sciences
291400 Materials Engineering
Abstract Doped ceria (CeO2) compounds are fluorite related oxides which show oxide ionic conductivity higher than yttria-stabilized zirconia in oxidizing atmosphere. As a consequence of this, a considerable interest has been shown in application of these materials for low (400-650 degrees C) temperature operation of solid oxide fuel cells (SOFCs). In this paper, our experimental data about the influence of microstructure at the atomic level on electrochemical properties were reviewed in order to develop high quality doped CeO2 electrolytes in fuel cell applications. Using this data in the present paper, our original idea for a design of nanodomain structure in doped CeO2 electrolytes was suggested. The nanosized powders and dense sintered bodies of M doped CeO2 (M:Sm,Gd,La,Y,Yb, and Dy) compounds were fabricated. Also nanostiructural features in these specimens were introduced for conclusion of relationship between electrolytic properties and domain structure in doped CeO2. It is essential that the electrolytic properties in doped CeO2 solid electrolytes reflect in changes of microstructure even down to the atomic scale. Accordingly, a combined approach of nanostructure fabrication, electrical measurement and structure characterization was required to develop superior quality doped CeO2 electrolytes in the fuel cells.
Keyword Physics, Nuclear
Doped Ceo2
Oxide Ionic Conductivity
Microdomain
Low Temperature Operation Of Fuel Cells Application
Nanohetero Structure
Domain Structure
Ionic-conductivity
Fuel-cells
Trivalent Cations
Ceria
Sm
Microstructures
Oxides
La
Dy
Chemistry, Inorganic & Nuclear
Q-Index Code C1

 
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Created: Wed, 15 Aug 2007, 09:57:32 EST