This book investigates an easy and economical way of production of SOFC with high power density. The key factor is to use a protective layer which is LDC, between Nickel containing anode and LSGM electrolyte. According to the coating technique, it is essential to apply multiple sintering for the LSGM and LDC layers instead of co-sintering. Co-sintering result in undesired LaNiO3 phase between LDC and LSGM because of the surface diffusion of Nickel ions until full densification.