GD(1-X)A(X)MNO(3) (A=CA AND SR) FOR THE ELECTRODE OF SOLID OXIDE FUEL-CELLS

From the viewpoint of the electrode for solid oxide fuel cells, Gd(1-2 )A(x)MnO(3) (A Ca and Sr) was studied for its electrical conductivity, cathodic polarization, and reactivity with yttria-stabilized zirconia [8 mole percent (m/o)] Y2O3 doped zirconia]. Although cathodic activi ty and electrical conductivity are similar to the La(1-x)A(x)MnO(2) sy stem, stability with yttria-stabilized zirconia electrolyte is far sup erior. Gd(1-x)A(x)MnO(3) (x less than or equal to 0.5), for example, y ields no reaction product with yttria-stabilized zirconia at high temp erature, which is very attractive for practical applications in a soli d oxide fuel cell.