Synthesis of Fine Particle Materials for Solid Oxide Fuel Cell by Aerosol Processing

Abstract

Spray pyrolysis is a typical liquid-to-particle conversion processing, and can form complex and highly crystalline oxides due to nucleation in liquid phase and pyrolysis in gas phase at a high temperature. And, this method can control the fine structure in/on the particles with an additive into the source solution. By the spray pyrolysis with citric acid as the additive, aqueous droplets of metal nitrates can convert to porous oxide particles. The electrode, cathode and anode, of solid oxide fuel cell (SOFC) needs porous structure for larger reaction area and higher gas diffusivity. The synthesis of the particle materials of the SOFC electrodes by the spray pyrolysis method with citric acid and the electrochemical evaluation for SOFC are reviewed.