Study on an Efficient and Flexible SOFC System

To realize "efficient and flexible" solid oxide fuel cells which can be operated in a variety of fuels without a rigid control of water content for reforming, we focused on the investigation of materials and catalysts for SOFC fuel electrode, electrolyte, and reforming devices. In addition to the combination of conventional electrode/electrolyte such as nickel / yttria stabilized zirconia, a new type of mixed conducting anode material, calcium titanate, was tested to understand the issues to be solved for direct oxidation of fuel in SOFCs. The results of cell testing and electrochemical or catalytic measurement of anodes should be correlated with the fundamental oxygen and proton transport properties of the materials.