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dc.contributor.authorLiu, Y.
dc.contributor.authorChen, Kongfa
dc.contributor.authorZhao, Ling
dc.contributor.authorChi, B.
dc.contributor.authorPu, J.
dc.contributor.authorJiang, San Ping
dc.identifier.citationLiu, Y. and Chen, K. and Zhao, L. and Chi, B. and Pu, J. and Jiang, S.P. 2014. Performance stability and degradation mechanism of La0.6Sr0.4Co0.2Fe0.8O3-δ cathodes under solid oxide fuel cells operation conditions. International Journal of Hydrogen Energy. 39 (28): pp. 15868-15876.

The performance stability and degradation mechanism of La0.6Sr0.4Co0.2Fe0.8O3d (LSCF)cathodes and LSCF impregnated Gd0.1Ce0.9O2d (LSCF-GDC) cathodes are investigated undersolid oxide fuel cell operation conditions. LSCF and LSCF-GDC cathodes show initiallyperformance improvement but degrade under cathodic polarization treatment at 750 C for120 h. The results confirm the grain growth and agglomeration of LSCF and in particularGDC-LSCF cathodes as well as the formation of SrCoOx particles on the surface of LSCFunder cathodic polarization conditions. The direct observation of SrCoOx formation hasbeen made possible on the surface of dense LSCF electrode plate on GDC electrolyte. Theformation of SrCoOx is most likely due to the interaction between the segregated Sr and Cofrom LSCF lattice under polarization conditions. The formation of SrCoOx would contributeto the deterioration of the electrocatalytic activity of the LSCF-based electrodes for the O2reduction in addition to the agglomeration and microstructure coarsening

dc.publisherElsevier Ltd
dc.subjectLSCF impregnated GDC
dc.subjectCurrent treatment - Degradation mechanism
dc.subjectLSCF cathode
dc.subjectSolid oxide fuel cells
dc.titlePerformance stability and degradation mechanism of La0.6Sr0.4Co0.2Fe0.8O3-δ cathodes under solid oxide fuel cells operation conditions
dc.typeJournal Article
dcterms.source.titleInternational Journal of Hydrogen Energy

NOTICE: this is the author’s version of a work that was accepted for publication in International Journal of Hydrogen Energy. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in International Journal of Hydrogen Energy, Vol. 39, no. 28 (2014). DOI: 10.1016/j.ijhydene.2014.03.077

curtin.departmentDepartment of Chemical Engineering
curtin.accessStatusOpen access

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