The EPD process has been used for the fabrication of SOFC components including YSZ[104,105], and (La,Sr)(Ga,Mg)O3 electrolyte films[106, 107] The EPD process is very simple and has the advantage of the uniformity of deposition and high deposition rate. In the case of the deposition of YSZ thin electrolyte layers, YSZ nanoparticles are dispersed in an organic suspension medium, such as ethanol, acetylacetone, or iodine-dissolved acetylacetone, instead of water, to avoid the detrimental effect of water electrolysis on the quality of deposited film. Positive charges are developed on the YSZ particles due to the presence of some residual water.