Grain-boundary conduction in gadolinia-doped ceria: The effect of SrO addition

Cho, Pyeong-Seok, Cho, Yoon Ho, Park, Seung-Young, Lee, Sung Bo, Kim, Doh-Yeon, Park, Hyun-Min, Auchterlonie, Graeme, Drennan, John and Lee, Jong-Heun (2009) Grain-boundary conduction in gadolinia-doped ceria: The effect of SrO addition. Journal of the Electrochemical Society, 156 3: B339-B344. doi:10.1149/1.3046153

Author Cho, Pyeong-Seok
Cho, Yoon Ho
Park, Seung-Young
Lee, Sung Bo
Kim, Doh-Yeon
Park, Hyun-Min
Auchterlonie, Graeme
Drennan, John
Lee, Jong-Heun
Title Grain-boundary conduction in gadolinia-doped ceria: The effect of SrO addition
Journal name Journal of the Electrochemical Society   Check publisher's open access policy
ISSN 1945-7111
Publication date 2009
Year available 2009
Sub-type Article (original research)
DOI 10.1149/1.3046153
Volume 156
Issue 3
Start page B339
End page B344
Total pages 6
Editor Dr. Paul A Kohl
Place of publication Pennington, NJ, United States
Publisher Electrochemical Society
Collection year 2010
Language eng
Subject 0305 Organic Chemistry
0399 Other Chemical Sciences
Formatted abstract
This study examined the effect of adding SrO on the grain-boundary conduction of Ce0.9Gd0.1O1.95 gadolinia-doped ceria containing 500 ppm SiO2. The apparent grain-boundary resistivity at 300°C decreased drastically from 746.7 to 0.90–1.97 kΩ cm upon doping with ≥1 mol % SrO, while the grain-interior resistivity increased gradually from 3.1 to 11.6 kΩ cm as the SrO concentration was increased up to 5 mol %. Therefore, doping with 1 mol % SrO resulted in the minimum total resistivity. The electron probe X-ray microanalysis and the analysis of the lattice parameters suggest that the 140–500-fold enhancement in the grain-boundary conduction is attributed to the scavenging of the highly resistive siliceous phase by the SrO-containing phase.
Keyword Grain boundary
Solid oxide fuel cell
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: 2010 Higher Education Research Data Collection
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Centre for Microscopy and Microanalysis Publications
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Citation counts: TR Web of Science Citation Count  Cited 14 times in Thomson Reuters Web of Science Article | Citations
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Created: Thu, 03 Sep 2009, 08:09:14 EST by Mr Andrew Martlew on behalf of Centre for Microscopy and Microanalysis