In this work, we successfully applied a FIB/lift-out technique to prepare site-specific thin samples containing the cathode/electrolyte interface between two La0.4Sr0.6Co0.8Fe0.2O3-delta (LSCF) / Ce0.9Gd0.1O2-delta (CGO) half cells. Despite different cathode thicknesses (15 mu m and a 5 mu m), both samples presented similar composition and nano-sized structure. However, an exhaustive microscopic analysis by SEM and TEM in high resolution modes revealed that the 15 mu m sample presented a perfectly attached interface, while the other showed pores at the interfacial boundary, decreasing the real LSCF/CGO contact and increasing the area specific resistance. The presented combined techniques are a powerful tool to investigate subtle microstructural changes that may occur in the electrolyte/electrode interface and are adequate for studying changes after long term operation conditions.
|Journal||E C S Transactions|
|Publication status||Published - 2011|
|Event||12th International Symposium on Solid Oxide Fuel Cells, 219th ECS Meeting - Montreal Convention Center, Montreal, QC, Canada|
Duration: 1 May 2011 → 6 May 2011
|Conference||12th International Symposium on Solid Oxide Fuel Cells, 219th ECS Meeting|
|Location||Montreal Convention Center|
|Period||01/05/2011 → 06/05/2011|