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    Chromium deposition and poisoning of LSCF and LSM oxygen electrodes of solid oxide electrolysis cells

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    Authors
    Chen, K.
    Bo, W.
    Hyodo, J.
    Ishihara, T.
    Jiang, San Ping
    Date
    2015
    Type
    Journal Article
    
    Metadata
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    Citation
    Chen, K. and Bo, W. and Hyodo, J. and Ishihara, T. and Jiang, S.P. 2015. Chromium deposition and poisoning of LSCF and LSM oxygen electrodes of solid oxide electrolysis cells. ECS Transactions. (68 (1): pp. 793-799.
    Source Title
    ECS Transactions
    DOI
    10.1149/06801.0793ecst
    ISBN
    9781607685395
    School
    Fuels and Energy Technology Institute
    URI
    http://hdl.handle.net/20.500.11937/20000
    Collection
    • Curtin Research Publications
    Abstract

    The degradation of solid oxide electrolysis cells (SOECs) is an issue of both scientific and technical importance. In this study, chromium deposition and poisoning at La0.6Sr0.4Co0.2Fe0.8O3-d (LSCF) and La0.8Sr0.2MnO3+d (LSM) oxygen electrodes are studied under SOEC operation conditions at 800 oC. Performance degradation was observed for the reaction in the presence of Fe-Cr alloy metallic interconnect. The results indicate the deposition of SrCrO4, CrO2.5 and Cr2O3 phases on the surface of LSCF oxygen electrodes and YSZ electrolyte surface and on the LSM electrode inner surface. Cr deposition is closely related to the increased segregation of SrO species under anodic polarization conditions.

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