Influence of ethanol supercritical drying treatment on morphology and electrochemical properties of DyBaCo2O5+δ cathode material

Effects of ethanol supercritical drying treatment on morphology and electrochemical performance of DyBaCo2O5+δ (DBC), as cathode material for intermediate temperature solid oxide fuel cells (IT-SOFCs), was comparatively investigated. Powder samples were synthesized by EDTA–citric acid (EC) and ethanol supercritical drying assisted EDTA–citric acid (SCEC) techniques. The scanning electron microscopy (SEM) images show the particles synthesized by SCEC were smaller than those prepared by the EC method. The area specific resistance (ASR) value of SCEC-DBC as cathode was lower than that of DBC-EC cathode. The maximum power density of the single cell with SCEC-DBC cathode was higher than that of the cell with EC-DBC cathode in the investigated temperature range from 550 to 650 °C.