SOFC Based on Proton Conductors

We have fabricated a solid oxide fuel cell (SOFC) using BaCe0.8Y0.2Ox (BCY20) proton conductor as the electrolyte. An approximate to 10-mu m-thick dense BCY film was prepared on a porous Ni/BCY cermet (i.e., ceramic/metal composite) substrate by a dip coating process. The gas-permeable Ni/BCY cermet substrate backed with nickel mesh was used as the anode, and a platinum paste backed with platinum mesh served as the cathode. The performance characteristics of the BCY-based SOFC were measured in the temperature range 450-800 degrees C using wet air on the cathode side and hydrogen on the anode side. The power density of the fuel cell was approximate to 90 and approximate to 1500 mW/cm(2) at 450 and 800 degrees C, respectively.