Abstract
We investigated the use of Pr1−xTbxO2−d (x = 0.0–1.0) as the active layer material in an SOFC cathode. Pr1−xTbxO2−d (x = 0.0–1.0) was successfully synthesized in a single-phase fluorite structure consisting of a solid solution of Pr6O11 and Tb4O7. When x was between 0.3 and 0.6, the phase transition between room temperature and 800 °C was eliminated. Coin cells with GDC electrolyte, a Pr1−xTbxO2−d (x = 0.0–1.0) active layer and a LaNi0.6Fe0.4O3 (LNF) current collecting layer were fabricated to clarify the effect of this active layer. The interface resistance of these cathodes was measured with an AC impedance method at 800 °C. The cathodes with a Pr1−xTbxO2−d (all compositions) active layer performed better than a reference cathode with no active layer (simply an LNF layer).
Publisher
The Electrochemical Society
Subject
Materials Chemistry,Electrochemistry,Surfaces, Coatings and Films,Condensed Matter Physics,Renewable Energy, Sustainability and the Environment,Electronic, Optical and Magnetic Materials