Evaluation of LSF based SOFC Cathodes using Cone-shaped Electrodes

Kent Kammer Hansen; Mogens Bjerg Mogensen

doi:10.1149/1.3050387

Evaluation of LSF based SOFC Cathodes using Cone-shaped Electrodes

Kent Kammer Hansen
, Mogens Bjerg Mogensen

Research output: Contribution to journal › Conference article › Research › peer-review

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Abstract

Seven La1-xSrxFeO3-delta (x = 0, 0.05, 0.15, 0.25, 0.35, 0.50, 0.70) based perovskites were synthesized using the glycine-nitrate method. The La1-xSrxFeO3-delta compounds were characterized with powder X-ray diffraction and electrochemical impedance spectroscopy on cone-shaped electrodes using a Ce1.9Gd0.1O1.95 electrolyte. The activity of the La1-xSrxFeO3-delta based perovskites towards the electrochemical reduction of oxygen was strongly dependent of the strontium content, the activity being highest for the composition La0.85Sr0.15FeO3-delta. The results indicates that Fe(III) is the catalytic active specie towards the electrochemical reduction of oxygen in a solid oxide fuel cell on La1-xSrxFeO3-delta compounds. The results also show that oxide ion vacancies in the perovskite structure are important for the electrochemical reduction of oxygen. However, the effect of ordering of oxide ion vacancies for the strontium rich compounds can not be excluded.

Original language	English
Journal	ECS Transactions
Volume	13
Issue number	26
Pages (from-to)	153-160
ISSN	1938-5862
DOIs	https://doi.org/10.1149/1.3050387
Publication status	Published - 2008
Event	213th ECS Meeting: D1 - Corrosion General Session - Phoenix Convention Center, Phoenix, United States Duration: 18 May 2008 → 23 May 2008 Conference number: 213 http://www.electrochem.org/meetings/biannual/213/213.htm

Conference

Conference	213th ECS Meeting
Number	213
Location	Phoenix Convention Center
Country/Territory	United States
City	Phoenix
Period	18/05/2008 → 23/05/2008
Internet address	http://www.electrochem.org/meetings/biannual/213/213.htm

Bibliographical note

Copyright The Electrochemical Society, Inc. [2008]. All rights reserved. Except as provided under U.S. copyright law, this work may not be reproduced, resold, distributed, or modified without the express permission of The Electrochemical Society (ECS).

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title = "Evaluation of LSF based SOFC Cathodes using Cone-shaped Electrodes",

abstract = "Seven La1-xSrxFeO3-delta (x = 0, 0.05, 0.15, 0.25, 0.35, 0.50, 0.70) based perovskites were synthesized using the glycine-nitrate method. The La1-xSrxFeO3-delta compounds were characterized with powder X-ray diffraction and electrochemical impedance spectroscopy on cone-shaped electrodes using a Ce1.9Gd0.1O1.95 electrolyte. The activity of the La1-xSrxFeO3-delta based perovskites towards the electrochemical reduction of oxygen was strongly dependent of the strontium content, the activity being highest for the composition La0.85Sr0.15FeO3-delta. The results indicates that Fe(III) is the catalytic active specie towards the electrochemical reduction of oxygen in a solid oxide fuel cell on La1-xSrxFeO3-delta compounds. The results also show that oxide ion vacancies in the perovskite structure are important for the electrochemical reduction of oxygen. However, the effect of ordering of oxide ion vacancies for the strontium rich compounds can not be excluded.",

keywords = "Br{\ae}ndselsceller og brint",

author = "\{Kammer Hansen\}, Kent and Mogensen, \{Mogens Bjerg\}",

note = "Copyright The Electrochemical Society, Inc. [2008]. All rights reserved. Except as provided under U.S. copyright law, this work may not be reproduced, resold, distributed, or modified without the express permission of The Electrochemical Society (ECS).; 213th ECS Meeting : D1 - Corrosion General Session ; Conference date: 18-05-2008 Through 23-05-2008",

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T1 - Evaluation of LSF based SOFC Cathodes using Cone-shaped Electrodes

AU - Kammer Hansen, Kent

AU - Mogensen, Mogens Bjerg

N1 - Conference code: 213

PY - 2008

Y1 - 2008

N2 - Seven La1-xSrxFeO3-delta (x = 0, 0.05, 0.15, 0.25, 0.35, 0.50, 0.70) based perovskites were synthesized using the glycine-nitrate method. The La1-xSrxFeO3-delta compounds were characterized with powder X-ray diffraction and electrochemical impedance spectroscopy on cone-shaped electrodes using a Ce1.9Gd0.1O1.95 electrolyte. The activity of the La1-xSrxFeO3-delta based perovskites towards the electrochemical reduction of oxygen was strongly dependent of the strontium content, the activity being highest for the composition La0.85Sr0.15FeO3-delta. The results indicates that Fe(III) is the catalytic active specie towards the electrochemical reduction of oxygen in a solid oxide fuel cell on La1-xSrxFeO3-delta compounds. The results also show that oxide ion vacancies in the perovskite structure are important for the electrochemical reduction of oxygen. However, the effect of ordering of oxide ion vacancies for the strontium rich compounds can not be excluded.

AB - Seven La1-xSrxFeO3-delta (x = 0, 0.05, 0.15, 0.25, 0.35, 0.50, 0.70) based perovskites were synthesized using the glycine-nitrate method. The La1-xSrxFeO3-delta compounds were characterized with powder X-ray diffraction and electrochemical impedance spectroscopy on cone-shaped electrodes using a Ce1.9Gd0.1O1.95 electrolyte. The activity of the La1-xSrxFeO3-delta based perovskites towards the electrochemical reduction of oxygen was strongly dependent of the strontium content, the activity being highest for the composition La0.85Sr0.15FeO3-delta. The results indicates that Fe(III) is the catalytic active specie towards the electrochemical reduction of oxygen in a solid oxide fuel cell on La1-xSrxFeO3-delta compounds. The results also show that oxide ion vacancies in the perovskite structure are important for the electrochemical reduction of oxygen. However, the effect of ordering of oxide ion vacancies for the strontium rich compounds can not be excluded.

KW - Brændselsceller og brint

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JO - ECS Transactions

JF - ECS Transactions

IS - 26

T2 - 213th ECS Meeting

Y2 - 18 May 2008 through 23 May 2008

ER -

Evaluation of LSF based SOFC Cathodes using Cone-shaped Electrodes

Abstract

Conference

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