Chemical and electrical properties of BaPr0.7Gd0.3O3−δ

John Thomas Sirr Irvine; A Magrasó; F Espiell; M Segarra

doi:doi:10.1016/j.jpowsour.2007.01.041

Chemical and electrical properties of BaPr_0.7Gd_0.3O₃₋_δ

John Thomas Sirr Irvine, A Magrasó, F Espiell, M Segarra

Research output: Contribution to journal › Article › peer-review

23 Citations (Scopus)

Abstract

Doped perovskites have a growing interest as electrolytes for IT-SOFCs. In the search for proton conducting electrolytes, Gd-doped BaPrO3 was studied. The present work reports the chemical stability and electrical conductivity of BaPr0.7Gd0.3O3-delta powders. This system is found to be highly reactive under water, CO2 and hydrogen containing atmospheres. Comparison of the conduction behaviour measured at different atmospheres indicates that the system behaves as a p-type electronic conductor. The total conductivity is about 1 x 10(-3) S cm(-1) at 300 degrees C, in dry O-2. The resistance of the system seems to be dominated by the grain boundary contribution. However, structure investigation reveals there is a gadolinia segregation, which may act as a resistive barrier. The material is not suitable for SOFC applications due to its low stability. (c) 2007 Elsevier B.V. All rights reserved.

Original language	English
Pages (from-to)	53–58
Number of pages	6
Journal	Journal of Power Sources
Volume	169
DOIs	https://doi.org/doi:10.1016/j.jpowsour.2007.01.041
Publication status	Published - 10 Jun 2007

Keywords

BaPrO3
p-type conductivity
proton conductivity
electrolyte
electrode
perovskite
CONDUCTIVITY

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doi:10.1016/j.jpowsour.2007.01.041

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title = "Chemical and electrical properties of BaPr0.7Gd0.3O3−δ",

abstract = "Doped perovskites have a growing interest as electrolytes for IT-SOFCs. In the search for proton conducting electrolytes, Gd-doped BaPrO3 was studied. The present work reports the chemical stability and electrical conductivity of BaPr0.7Gd0.3O3-delta powders. This system is found to be highly reactive under water, CO2 and hydrogen containing atmospheres. Comparison of the conduction behaviour measured at different atmospheres indicates that the system behaves as a p-type electronic conductor. The total conductivity is about 1 x 10(-3) S cm(-1) at 300 degrees C, in dry O-2. The resistance of the system seems to be dominated by the grain boundary contribution. However, structure investigation reveals there is a gadolinia segregation, which may act as a resistive barrier. The material is not suitable for SOFC applications due to its low stability. (c) 2007 Elsevier B.V. All rights reserved.",

keywords = "BaPrO3, p-type conductivity, proton conductivity, electrolyte, electrode, perovskite, CONDUCTIVITY",

author = "Irvine, {John Thomas Sirr} and A Magras{\'o} and F Espiell and M Segarra",

year = "2007",

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language = "English",

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T1 - Chemical and electrical properties of BaPr0.7Gd0.3O3−δ

AU - Irvine, John Thomas Sirr

AU - Magrasó, A

AU - Espiell, F

AU - Segarra, M

PY - 2007/6/10

Y1 - 2007/6/10

N2 - Doped perovskites have a growing interest as electrolytes for IT-SOFCs. In the search for proton conducting electrolytes, Gd-doped BaPrO3 was studied. The present work reports the chemical stability and electrical conductivity of BaPr0.7Gd0.3O3-delta powders. This system is found to be highly reactive under water, CO2 and hydrogen containing atmospheres. Comparison of the conduction behaviour measured at different atmospheres indicates that the system behaves as a p-type electronic conductor. The total conductivity is about 1 x 10(-3) S cm(-1) at 300 degrees C, in dry O-2. The resistance of the system seems to be dominated by the grain boundary contribution. However, structure investigation reveals there is a gadolinia segregation, which may act as a resistive barrier. The material is not suitable for SOFC applications due to its low stability. (c) 2007 Elsevier B.V. All rights reserved.

AB - Doped perovskites have a growing interest as electrolytes for IT-SOFCs. In the search for proton conducting electrolytes, Gd-doped BaPrO3 was studied. The present work reports the chemical stability and electrical conductivity of BaPr0.7Gd0.3O3-delta powders. This system is found to be highly reactive under water, CO2 and hydrogen containing atmospheres. Comparison of the conduction behaviour measured at different atmospheres indicates that the system behaves as a p-type electronic conductor. The total conductivity is about 1 x 10(-3) S cm(-1) at 300 degrees C, in dry O-2. The resistance of the system seems to be dominated by the grain boundary contribution. However, structure investigation reveals there is a gadolinia segregation, which may act as a resistive barrier. The material is not suitable for SOFC applications due to its low stability. (c) 2007 Elsevier B.V. All rights reserved.

KW - BaPrO3

KW - p-type conductivity

KW - proton conductivity

KW - electrolyte

KW - electrode

KW - perovskite

KW - CONDUCTIVITY

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DO - doi:10.1016/j.jpowsour.2007.01.041

M3 - Article

SN - 0378-7753

VL - 169

SP - 53–58

JO - Journal of Power Sources

JF - Journal of Power Sources

ER -

Chemical and electrical properties of BaPr_0.7Gd_0.3O₃₋_δ

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Keywords

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