SOLID OXIDE FUEL-CELLS OF CERIA-DOPED WITH GADOLINIUM AND PRASEODYMIUM

Planar solid oxide fuel cells (SOFC) incorporating a single ceria elec trolyte element, doubly doped with gadolinium and praseodymium were fa bricated, and tested at 700 degrees C. Two fuel cell configurations we re investigated, platinum/ceria/platinum and platinum/ceria/perovskite . Argon-4% hydrogen was used at the anode and air at the cathode. The J-V and power density characteristics of these cells are reported; it appears that the doubly eloped ceria also possesses considerable elect ronic conductivity. Thermogravimetric analysis of the electrolyte in h ydrogen shows a chemical reduction of the material beginning at about 700 degrees C.