Abstract
The effect of parameters for composite powder preparation on the electrochemical performance of cathodes using a mechanically prepared LSM/ScSZ cathode material for solid oxide fuel cells was evaluated. It was revealed that the input process energy, which is defined as a time integration of required power for rotor-blade driving, was successfully described by the changes in BET surface area and particle size distribution of composite powder material. Depending on the composite powder samples, however, the bulk and interfacial resistances for a half-cell test sample varied in a more complex manner when the input process energy was changed. The present results indicated the importance of process parameters such as the input energy besides the absolute values and ratio of particle size for the starting powders and the LSM/ScSZ composition ratio. It can be expected that the electrochemical performance may be further improved with the precise matching and control of these parameters.
