An EIS study of La2-aEuro parts per thousand x Sr (x) NiO4+ (delta) SOFC cathodes

Kent Kammer Hansen

doi:10.1007/s11581-009-0331-7

An EIS study of La2-aEuro parts per thousand x Sr (x) NiO4+ (delta) SOFC cathodes

Kent Kammer Hansen

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Abstract

La2 − x Sr x NiO4 + δ materials were investigated as cathodes for the electrochemical reduction of oxygen on a Ce1.9Gd0.1O1.95 (CGO10) electrolyte using cone-shaped electrodes together with electrochemical impedance spectroscopy. The area-specific resistance (ASR) of the La2 − x Sr x NiO4 + δ nickelates towards the reduction of oxygen is equal to the ASR of perovskites; however, it is not as low as for the best Fe–Co-based perovskites. The lowest ASR is found for the compound La1.75Sr0.25NiO4 + δ with an ASR of 23.8 Ωcm2 measured on a cone-shaped electrode in air at 600 °C. It is suggested that difference in oxide ionic conductivity of the nickelates is the main cause for the different activity of the nickelates towards the electrochemical reduction of oxygen.

Original language	English
Journal	Ionics
Volume	15
Issue number	3
Pages (from-to)	325-328
ISSN	0947-7047
DOIs	https://doi.org/10.1007/s11581-009-0331-7
Publication status	Published - 2009

Keywords

Røggasrens
Fuel Cells and hydrogen
Flue gas purification

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10.1007/s11581-009-0331-7

Kammer hansen Ionics

http://www.springerlink.com/content/y84133724w30821w/

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title = "An EIS study of La2-aEuro parts per thousand x Sr (x) NiO4+ (delta) SOFC cathodes",

abstract = "La2 − x Sr x NiO4 + δ materials were investigated as cathodes for the electrochemical reduction of oxygen on a Ce1.9Gd0.1O1.95 (CGO10) electrolyte using cone-shaped electrodes together with electrochemical impedance spectroscopy. The area-specific resistance (ASR) of the La2 − x Sr x NiO4 + δ nickelates towards the reduction of oxygen is equal to the ASR of perovskites; however, it is not as low as for the best Fe–Co-based perovskites. The lowest ASR is found for the compound La1.75Sr0.25NiO4 + δ with an ASR of 23.8 Ωcm2 measured on a cone-shaped electrode in air at 600 °C. It is suggested that difference in oxide ionic conductivity of the nickelates is the main cause for the different activity of the nickelates towards the electrochemical reduction of oxygen.",

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author = "{Kammer Hansen}, Kent",

year = "2009",

doi = "10.1007/s11581-009-0331-7",

language = "English",

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AB - La2 − x Sr x NiO4 + δ materials were investigated as cathodes for the electrochemical reduction of oxygen on a Ce1.9Gd0.1O1.95 (CGO10) electrolyte using cone-shaped electrodes together with electrochemical impedance spectroscopy. The area-specific resistance (ASR) of the La2 − x Sr x NiO4 + δ nickelates towards the reduction of oxygen is equal to the ASR of perovskites; however, it is not as low as for the best Fe–Co-based perovskites. The lowest ASR is found for the compound La1.75Sr0.25NiO4 + δ with an ASR of 23.8 Ωcm2 measured on a cone-shaped electrode in air at 600 °C. It is suggested that difference in oxide ionic conductivity of the nickelates is the main cause for the different activity of the nickelates towards the electrochemical reduction of oxygen.

KW - Røggasrens

KW - Fuel Cells and hydrogen

KW - Flue gas purification

KW - Brændselsceller og brint

U2 - 10.1007/s11581-009-0331-7

DO - 10.1007/s11581-009-0331-7

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SN - 0947-7047

IS - 3

ER -

An EIS study of La2-aEuro parts per thousand x Sr (x) NiO4+ (delta) SOFC cathodes

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