21. Syntheses of Composite Porous Materials for Solid Oxide Fuel Cells

This section focuses on the syntheses and characterization of composite porous materials for solid oxide fuel cell (SOFC) electrodes. Considerable efforts have been made to enlarge the triple phase boundary (TPB) where electrode, electrolyte, and pore phases meet, for reducing polarization loss in SOFC. Composite particles, which consist of electrode and electrolyte materials, have been prepared for this purpose, because their utilization is to improve the homogeneity of electrode and electrolyte particle distribution in SOFC electrodes. Among several wet-chemical routes for syntheses of the composite particles, coprecipitation method has been found a particular interest because of its simplicity, cost-effective, and easy scale-up capability. The emphasis will be therefore placed on the development of coprecipitation methods for enlarged TPB in SOFC electrodes.