“…32,33 Systems based on cerium oxide, lanthanum gallate and proton conducting oxides are being considered as electrolyte materials. 34,35 Lanthanide cobaltites, ferrites or nickelites as cathode materials and nickel-cermet materials as anode materials (cermet based on CeO 2 , LaScO 3 , BaZrO 3 and others) are considered as promising electrode materials. 33,[36][37][38][39][40] SOFC operation at high and medium-high temperatures is associated with processes leading to metal corrosion and oxidation; diffusion of ions from the electrode material into the electrolyte, leading to deterioration of conductivity and stability; segregation of cations on the surface of structural elements, forming new phases; degradation of the electrochemical cell; or poisoning of SOFC anodes (Cl 2 , H 2 S, CH 3 SH, COS) [41][42][43] and cathodes (SO 2 , PO 3 , CrO 3 ).…”