High temperature properties of Ce1-xPrxO2-δ as an active layer material for SOFC cathodes
Reiichi Chiba
1
,
Hiroaki Taguchi
1
,
Takeshi Komatsu
1
,
Himeko Orui
1
,
Kazuhiko Nozawa
1
,
HAJIME ARAI
1
1
NTT Energy and Environment Systems Laboratories, NTT Corporation, Kanagawa, Japan
|
Publication type: Journal Article
Publication date: 2011-08-21
scimago Q2
wos Q2
SJR: 0.672
CiteScore: 5.3
Impact factor: 3.3
ISSN: 01672738, 18727689
General Chemistry
Condensed Matter Physics
General Materials Science
Abstract
Abstract We prepared Ce 1-x Pr x O 2-δ and investigated its high temperature properties as a material for the composite active layer of a solid oxide fuel cell (SOFC) cathode. We found that increasing the Pr concentration increases the total conductivity and oxygen vacancy concentration at high temperature, and this may lead to improvement of the cathodic reaction. When Ce 1-x Pr x O 2-δ is heated, it expands significantly at a certain temperature (T inf ), and this expansion depends on the Ce 1-x Pr x O 2-δ composition. The expansion is associated with an abrupt increase in the unit cell volume of the cubic structure. Abrupt increases in the total conductivity and oxygen vacancy concentration were also observed at T inf . These results can be explained by oxygen vacancy and electron formation (n-type electronic conductivity increase) at T inf and above T inf . A sample with a Ce 1-x Pr x O 2-δ composition where x = 1.0 has no such T inf . A composition near x = 1.0 for Ce 1-x Pr x O 2-δ is favorable for the active layer material of an SOFC cathode, because of the high conductivity and high concentration of oxygen vacancies.
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Chiba R. et al. High temperature properties of Ce1-xPrxO2-δ as an active layer material for SOFC cathodes // Solid State Ionics. 2011. Vol. 197. No. 1. pp. 42-48.
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Chiba R., Taguchi H., Komatsu T., Orui H., Nozawa K., ARAI H. High temperature properties of Ce1-xPrxO2-δ as an active layer material for SOFC cathodes // Solid State Ionics. 2011. Vol. 197. No. 1. pp. 42-48.
Cite this
RIS
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TY - JOUR
DO - 10.1016/j.ssi.2011.03.022
UR - https://doi.org/10.1016/j.ssi.2011.03.022
TI - High temperature properties of Ce1-xPrxO2-δ as an active layer material for SOFC cathodes
T2 - Solid State Ionics
AU - Chiba, Reiichi
AU - Taguchi, Hiroaki
AU - Komatsu, Takeshi
AU - Orui, Himeko
AU - Nozawa, Kazuhiko
AU - ARAI, HAJIME
PY - 2011
DA - 2011/08/21
PB - Elsevier
SP - 42-48
IS - 1
VL - 197
SN - 0167-2738
SN - 1872-7689
ER -
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BibTex (up to 50 authors)
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@article{2011_Chiba,
author = {Reiichi Chiba and Hiroaki Taguchi and Takeshi Komatsu and Himeko Orui and Kazuhiko Nozawa and HAJIME ARAI},
title = {High temperature properties of Ce1-xPrxO2-δ as an active layer material for SOFC cathodes},
journal = {Solid State Ionics},
year = {2011},
volume = {197},
publisher = {Elsevier},
month = {aug},
url = {https://doi.org/10.1016/j.ssi.2011.03.022},
number = {1},
pages = {42--48},
doi = {10.1016/j.ssi.2011.03.022}
}
Cite this
MLA
Copy
Chiba, Reiichi, et al. “High temperature properties of Ce1-xPrxO2-δ as an active layer material for SOFC cathodes.” Solid State Ionics, vol. 197, no. 1, Aug. 2011, pp. 42-48. https://doi.org/10.1016/j.ssi.2011.03.022.