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Development and performance of MgFeCrO4 – based electrodes for solid oxide fuel cells

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Date
28/07/2013
Author
Stefan, Elena
Connor, Paul Alexander
Irvine, John Thomas Sirr
Keywords
solid oxide fuel cells (SOFC)
Yttria stabilised zirconia (YSZ)
Chromium-rich spinel
Spectroscopy
Symmetrical cell configuration
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Abstract
Composite anodes for solid oxide fuel cells (SOFC) developed on yttria stabilised zirconia (YSZ) porous supports by infiltration of electrode materials has been successfully applied for various anode and cathode compositions, resulting in high performance SOFC devices. The focus of this study is the performance of the chromium-rich spinel (MgFeCrO4) as an electrode support material when used alone or impregnated. The composite anodes were prepared by aqueous infiltration of nitrate salts to produce (La0.75Sr0.25)0.97Cr0.5Mn0.5O3−δ, Ce0.9Gd0.1O2−δ, CeO2 or Pd into a MgFeCrO4 scaffold with 45% porosity and studied by electrochemical impedance spectroscopy in symmetrical cell configuration. The performance was evaluated in humidified 5% H2/Ar in order to quantify their stability and performance up to 850 °C with respect to the MgFeCrO4 porous substrate. It was found that all the impregnated phases adhere very well to the spinel and considerably enhance performance and stability to a level required for SOFC applications. MgFeCrO4/LSCM/CGO and MgFeCrO4/LSCM/CGO/Pd showed the most substantial improvement in comparison to the scaffold’s performance, with ASR values of 1.74 Ω cm2 and 0.91 Ω cm2, respectively.
Citation
Stefan , E , Connor , P A & Irvine , J T S 2013 , ' Development and performance of MgFeCrO 4 – based electrodes for solid oxide fuel cells ' , Journal of Materials Chemistry A , vol. 1 , no. 28 , pp. 8262-8269 . https://doi.org/10.1039/C3TA11496A
Publication
Journal of Materials Chemistry A
Status
Peer reviewed
DOI
https://doi.org/10.1039/C3TA11496A
ISSN
2050-7488
Type
Journal article
Rights
Copyright 2013, the authors. Publisher retains licence to publish. The version of record of the article is avialabe at DOI: 10.1039/C3TA11496A.
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  • University of St Andrews Research
URI
http://hdl.handle.net/10023/4837

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