Influence of microstructure on the electrochemical behaviour of LSCF-SDCC

The correlation of cathode microstructure with the electrochemical behavior of LSCF-SDCC has been studied. In this study, LSCF-SDCC composite cathode powders were hamimah@uthm.edu.my prepared using ball milling and calcined at 700-900 degrees C. Cathode pellets were fabricated using the calcined powders via uniaxial press and sintered at 600 degrees C. A reduction of pellet porosity (33.1-29.8%) was observed as the calcination temperature increased, which was also in line with the cross-sectional view of the pellet. In electrochemical analysis, dominant resistance was observed in all samples which corresponded to low adsorption of oxygen. Meanwhile, cathode prepared with calcined powders of 750 degrees C exhibited the least area specific resistance that yielded single cell performance of 139 mW/cm(2) at 550 degrees C.