Effect of Addition of Gadolinia Doped Ceria on Theelectrical Properties of Lanthanum Strontium Manganite-yttria Stabilized Zirconia for Solid Oxide Fuelcell Cathode

A research on the effect of adding Gadolinia Doped Ceria (GDC) on the electrical property, in this case is the electronic conductivity of thick film ceramic of Lanthanum Strontium Manganite- Yttria Stabilized Zirconia (LSM-YSZ) used as an Solid Oxide Fuel Cell (SOFC) cathode has been done. Thick film cathode was coated by screen printing method. Compositions for the cathodes were 50 : 50 : 0; 50 : 40 : 10 and 50 : 30 : 20 for LSM, YSZ, and GDC, respectively. X-Ray Diffractometer (XRD) analysis showed that after the addition of GDC, it was known that there were three main phases in the thick film ceramic cathode i.e. LSM, YSZ, and GDC. Moreover, there was a second phase in each composition of thick film ceramic cathode of SrZrO3. Scanning Electron Microscope (SEM) analysis showed that the number of pores and grain size of the LSM part increased qualitatively with increasing concentration of the GDC. Moreover, the electronic conductivity measurement using the Four Point Probe Technique showed that the addition of GDC also increased the electronic conductivity from 0.00406 S/cm to 1.082 S/cm at temperature of 600 oC