SOLID OXIDE FULE CELL CATHODE AND THE METHOD OF PREPARATION THEREOF

摘要

The present invention relates to a cathode for a solid oxide fuel cell including: a lanthanum nickel ferrite (LNF) crystal grain; and a gadolinium doped ceria (GDC) crystal grain, in which the gadolinium doped ceria crystal grain includes nano-sized particles. The cathode for a solid oxide fuel cell according to the present invention includes the GDC crystal grain including the nano-sized particles in the LNF crystal grain, and thus is capable of contributing to LNF catalytic activity improvement and electrode resistance reduction and has durability with respect to steam-phase chrome. In addition, since the GDC crystal grain including the nano-sized particles is formed in the GDC crystal grain including micro-sized particles and the LNF crystal grain, the nano-sized GDC particles and the micro-sized GDC particles suppress growth of each other particles even during an extended period of exposure at a temperature of at least 800 C, and thus a particle growth-based performance change is insignificant. In a method for manufacturing a cathode for a solid oxide fuel cell according to the present invention, the nano-sized GDC particles can be subjected to uniform distribution on an LNF surface through simple mixing and impregnation steps. Accordingly, a cathode for a solid oxide fuel cell with excellent properties can be manufactured.