Abstract
The Ce component was coated on the as-prepared La0.3Sr0.7TiO3 (LST) particles. The lattice of LST did not change with the amount of Ce-coating after 1300-1400°C sintering in air but distortion occurred for the Ce-LST sintered at the temperature of 1500°C. The Ce diffusion into LST lattice to affect the lattice distortion was also observed for sintering at 1400°C in activated carbon atmosphere. The 1.5 and 3.0 mol% Ce coatings exhibited slightly lower conductivities than LST without Ce-coating under the 95%Ar+5%H2 atmosphere. The conductivity decreased significantly when the Ce-coating was too high such as 6 mol%. The Ce-LST anode increased the power performance of half-cell compared with the LST anode without Ce-coating. A suitable Ce-coating could behave high power density of the half-cell 3.0 mol% Ce-LST/LSBC. Thus, the Ce coating on LST could enhance the electrical properties of LST/LSBC cell due to the effect of Ce species diffusion into LST structure.
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