Low Temperature SOFCs with the Ruthenium Pyrochlore Cathode

Abstract

Bismuth ruthenium oxide with the pyrochlore structure was examined for the cathode of SOFC. The power generating characteristics of the SOFC was examined for the single cell of the SOFC constructed with the pyrochlore cathode with a composition, Bi₂Ru₂O₇, and the yttria stabilized zirconia as the electrolyte. The characteristics of the cell was examined at various temperatures; the pyrochlores showed high cathode performance and high power density even at low temperatures below 800°C. The pyrochlore is an attractive electrode for SOFC of low-temperature operating system.