Ce0.9Gd0.1O1.95 (CGO) protective layers are prepared by two different methods to prevent the reaction between
the Zr0.84Y0.16O1.92 (YSZ) electrolyte and the La0.6Sr0.4Co0.2Fe0.8O3-δ (LSCF) cathode. In the first method, the
CGO layers are deposited by an airbrushing technique from an ink containing CGO particles without and with
cobalt as sintering aids. The second strategy consists in preparing both a dense CGO barrier layer and a porous
LSCF cathode by spray-pyrolysis deposition, in order to further reduce the fabrication temperature and minimize
the reaction between the cell components. The samples prepared by spray-pyrolysis exhibit better performance
and durability than those obtained by conventional sintering methods. The results suggest that the interfacial
reactivity between YSZ and LSCF as well as the Sr-enrichment at the cathode surface can be avoided by using
low-temperature fabrication methods and by operating at temperatures lower than 650 °C.
