Solid oxide fuel cells (SOFCs) are next-generation power generators because of their high-energy conversion efficiency and fuel flexibility because of their high operating temperatures. Ensuring their stable operation in a long period is important for introducing SOFCs into practical applications. This chapter introduces a part of the work implemented in Ehime University about preparation and electrode membrane formation techniques aiming at lowering the operating temperature. On the basis of the high operating temperature, SOFCs have the highest-energy conversion efficiency among fuel cells. Perovskite oxides are currently accepted as a SOFC cathode material. SOFCs are fundamentally composed of a triple layer of different ceramics. Cell performance mostly depends on their morphologies, layer thicknesses, and interfaces. Electrophoretic deposition can be an effective technique for SOFC fabrication because it can form a highly dense and homogeneous film a few micrometers in thickness.