CATHODE LAYER AND MEMBRANE ELECTRODE ASSEMBLY OF SOLID OXIDE FUEL CELL

A cathode layer and a membrane electrode assembly of a solid oxide fuel cell are provided. The cathode layer consists of a plurality of perovskite crystal films, and the average change rate of linearthermal expansion coefficients of these perovskite crystal films is about 5% to 40% along the thickness direction. The membrane electrode assembly includes the above-mentioned cathode layer, and the linear thermal expansion coefficients of these perovskite crystal films are reduced towards the solid electrolyte layer of the membrane electrode assembly. 本发明公开一种固态氧化物燃料电池的阴极层与膜电极组。所述阴极层是由数层钙钛矿晶体层所构成，且这些钙钛矿晶体层的线性热膨胀系数在厚度方向的平均变化率为5％至40％。所述膜电极组具有上述阴极层，且钙钛矿晶体层的线性热膨胀系数是往膜电极组的固态电解质层减少。