The purpose of this invention is to improve the stability of LSCF-based cathode used for solid oxide fuel cells (SOFCs). Lanthanum strontium cobalt iron oxides (La(1-x)SrxCoyFe1-yO3-ƒÔ; LSCF) are well-known cathode materials for SOFCs. Although these materials reveal high initial power, they often experience rapid degradation in power. New optimized cell configuration and metallization was designed to improve the stability of the LSCF-based materials. It was found that the full coverage of a metallization layer combined with a thicker and less porous cathode layer helped to improve the stability of high-power LSCF cathode.