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dc.contributor.authorHe, S.
dc.contributor.authorChen, K.
dc.contributor.authorSaunders, M.
dc.contributor.authorQuadir, Z.
dc.contributor.authorTao, S.
dc.contributor.authorIrvine, J.
dc.contributor.authorCui, C.
dc.contributor.authorJiang, San Ping
dc.date.accessioned2018-12-13T09:13:58Z
dc.date.available2018-12-13T09:13:58Z
dc.date.created2018-12-12T02:46:51Z
dc.date.issued2018
dc.identifier.citationHe, S. and Chen, K. and Saunders, M. and Quadir, Z. and Tao, S. and Irvine, J. and Cui, C. et al. 2018. Interface formation and Mn segregation of directly assembled La0.8Sr0.2MnO3 cathode on Y2O3-ZrO2 and Gd2O3-CeO2 electrolytes of solid oxide fuel cells. Solid State Ionics. 325: pp. 176-188.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/72631
dc.identifier.doi10.1016/j.ssi.2018.08.016
dc.description.abstract

© 2018 The establishment of intimate electrode/electrolyte interface is very important in solid oxide fuel cells (SOFCs), because it plays a critical role in the overall cell performance and durability. In this study, Mn segregation and interface formation between directly assembled La0.8Sr0.2MnO3(LSM) electrode and yttrium-stabilized zirconia (YSZ) or gadolinium-doped ceria (GDC) electrolytes are studied using combined focused ion beam and scanning transmission electron microscopy (FIB-STEM). In the case of LSM/YSZ and LSM/GDC electrodes, a significant reduction in the electrode ohmic resistance is observed after cathodic polarization at 900 °C and 500 mA cm-2, indicating the formation of an intimate interface. However, LSM particles start to disintegrate at the electrode/electrolyte interface with the increase of polarization time in the case of LSM/YSZ electrode. On the other hand, the LSM/GDC interface is very stable with negligible microstructure change at the interface. Mn segregation from the LSM perovskite structure is identified under the influence of polarization in both LSM/YSZ and LSM/GDC electrodes. The results demonstrate that nature of the electrolyte plays a critical role in the electrochemical activity, microstructure, morphology and stability of LSM/electrolyte interface under SOFC operation conditions.

dc.publisherElsevier BV * North-Holland
dc.titleInterface formation and Mn segregation of directly assembled La0.8Sr0.2MnO3 cathode on Y2O3-ZrO2 and Gd2O3-CeO2 electrolytes of solid oxide fuel cells
dc.typeJournal Article
dcterms.source.volume325
dcterms.source.startPage176
dcterms.source.endPage188
dcterms.source.issn0167-2738
dcterms.source.titleSolid State Ionics
curtin.departmentFuels and Energy Technology Institute
curtin.accessStatusFulltext not available


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