Recently, it was shown that thin functional layers introduced between an electrolyte and cathode might improve cathode performance. However, the mechanism of this improvement still needs analysis. In this paper, a thin (∼140 nm), spin-coated perovskite layer (La0.6Sr0.4Co0.2Fe0.8O3-δ) was placed between a cathode (La0.6Sr0.4Co0.2Fe0.8O3-δ) and an electrolyte (Ce0.8Gd0.2O2-δ) and the effects of this investigated. The microstructure of this layer was varied in order to determine its impact on the electrical and electrochemical properties. It has been shown that a mesoporous, nanocrystalline layer increases the active area for oxygen reduction and charge transfer through the cathode/electrolyte interface, which improves performance. Moreover, the stability of the cathode from thermal stresses is increased. In contrast, the coarsening of the grain and the layer densification has a reduced impact on the cathode performance.
|Kategoria:||Publikacja w czasopiśmie|
|Typ:||artykuł w czasopiśmie wyróżnionym w JCR|
strony 168 - 174,
|Opis bibliograficzny:||Chrzan A., Karczewski J., Szymczewska D., Jasiński P.: Nanocrystalline cathode functional layer for SOFC// ELECTROCHIMICA ACTA. -Vol. 225, (2017), s.168-174|