PROBIEN 20416
INSTITUTO DE INVESTIGACION Y DESARROLLO EN INGENIERIA DE PROCESOS, BIOTECNOLOGIA Y ENERGIAS ALTERNATIVAS
Unidad Ejecutora - UE
artículos
Título:
La0.4Sr0.6Co0.8Fe0.2O3-d / Ce0.9Gd0.1O2-d Interface: Characterization by High Resolution SEM and TEM
Autor/es:
ANALÍA SOLDATI; LAURA BAQUÉ; HORACIO TROIANI; CARLOS COTARO; ANJA SCHREIBER; ALBERTO CANEIRO; ADRIANA SERQUIS
Revista:
ECS Transactions
Editorial:
The Electrochemical Society
Referencias:
Año: 2011 vol. 35 p. 657 - 664
ISSN:
1938-6737
Resumen:
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-d (LSCF) / Ce0.9Gd0.1O2-d (CGO) half cells. Despite different cathode thicknesses (15 micrometers and a 5 micrometers), 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 micrometers 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.
