FUEL-CELLS WITH DOPED LANTHANUM GALLATE ELECTROLYTE

Single cells with doped lanthanum gallate electrolyte material were co nstructed and tested from 600 to 800 degrees C. Both ceria and the ele ctrolyte material were mixed with NiO powder respectively to form comp osite anodes. Doped lanthanum cobaltite was used exclusively as the ca thode material. While high power density from the solid oxide fuel cel ls at 800 degrees C was achieved, our results clearly indicate that an ode overpotential is the dominant factor in the power loss of the cell s. Better anode materials and anode processing methods need to be foun d to fully utilize the high ionic conductivity of the doped lanthanum gallate and achieve higher power density at 800 degrees C from solid o xide fuel cells.