TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The rare earth is lanthanum. The transition metal comprises cobalt with nickel of structure Co1-yNiy.y = greater than or equal to0.3-less than or equal to0.7The perovskite material comprises La1-xExCo0.6Ni0.403.E = an alkaline earth metal; andx = greater than or equal to0.The dopant(s) is a sintering aid. The electrode comprises a noble metal and yttria stabilized zirconia. The noble metal comprises palladium. The contact layer comprises at least two outer layers and central layer of electrically conductive materials. The central layer comprises stress relief layer. The stress relief layer comprises particles of a conductive ceramic material coarser than in the outer layers, particles of a conductive ceramic material with different sintering characteristics than the outer layers, and porous metallic material. The stress-relief layer comprises coarse particles. The outer layers comprise fine particles.Preferred Properties: The coarse particles have an average diameter at least twice as large as the average diameter of the fine particles. The outer layers comprises particles having an average diameter of less than 2microns. The central layer comprises particles having diameter of greater than 2 microns. The central layer comprises lanthanum cobalt nickel oxide or lanthanum cobalate particles.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The rare earth is lanthanum. The transition metal comprises cobalt with nickel of structure Co1-yNiy.y = greater than or equal to0.3-less than or equal to0.7The perovskite material comprises La1-xExCo0.6Ni0.403.E = an alkaline earth metal; andx = greater than or equal to0.The dopant(s) is a sintering aid. The electrode comprises a noble metal and yttria stabilized zirconia. The noble metal comprises palladium. The contact layer comprises at least two outer layers and central layer of electrically conductive materials. The central layer comprises stress relief layer. The stress relief layer comprises particles of a conductive ceramic material coarser than in the outer layers, particles of a conductive ceramic material with different sintering characteristics than the outer layers, and porous metallic material. The stress-relief layer comprises coarse particles. The outer layers comprise fine particles.Preferred Properties: The coarse particles have an average diameter at least twice as large as the average diameter of the fine particles. The outer layers comprises particles having an average diameter of less than 2microns. The central layer comprises particles having diameter of greater than 2 microns. The central layer comprises lanthanum cobalt nickel oxide or lanthanum cobalate particles.