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    Sulphur poisoning of solid oxide electrolysis cell anodes

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    Fulltext not available
    Authors
    Wang, C.
    Chen, K.
    Jiang, T.
    Yang, Y.
    Song, Y.
    Meng, H.
    Jiang, San Ping
    Lin, B.
    Date
    2018
    Type
    Journal Article
    
    Metadata
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    Citation
    Wang, C. and Chen, K. and Jiang, T. and Yang, Y. and Song, Y. and Meng, H. and Jiang, S.P. et al. 2018. Sulphur poisoning of solid oxide electrolysis cell anodes. Electrochimica Acta. 269: pp. 188-195.
    Source Title
    Electrochimica Acta
    DOI
    10.1016/j.electacta.2018.02.149
    ISSN
    0013-4686
    School
    Fuels and Energy Technology Institute
    URI
    http://hdl.handle.net/20.500.11937/67269
    Collection
    • Curtin Research Publications
    Abstract

    Sulphur poisoning for state-of-the-art La 0.8 Sr 0.2 MnO 3-δ (LSM) anodes of solid oxide electrolysis cell (SOEC) was studied under anodic current of 200 mA/cm 2 in 1 ppm SO 2 air. After polarization in 1 ppm SO 2 -containing air at 800 °C for 40 h, electrode polarization resistance as well as ohmic resistance of LSM electrodes were measured 24.83 Ω cm 2 and 6.09 Ω cm 2 , which were around 4 as well as 3 times than initial values of LSM electrodes. Sulphur deposition prefers to take place at the LSM/YSZ interface and inner layer for LSM electrodes, leading to the formation of SrSO 4 compounds, which is confirmed by XRD and then leads to the microstructural change of the LSM electrodes. The anodic polarization promotes the SrO segregation, which is supported by the observation of the deposition of SrSO 4 compounds, accelerating LSM electrodes delamination. The results indicate the obvious poisoning effect for sulphur species of electrochemical activity as well as stability of SOEC electrodes.

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