Low Temperature Operation of Single Chamber Fuel Cell Using BaCeO3 Electrolyte Film as Proton Conductor Grown by Helicon Plasma Sputtering

Thin film single chamber solid oxide fuel cell (SC-SOFC) with Barium Cerium Oxide (BaCeO₃) electrolyte film as proton conductor, grown by the helicon plasma sputtering, was studied to determine the power generation property at lower operating temperatures between 200 and 400°C in the gas mixtures of hydrogen and oxygen. An SC-SOFC with a BaCeO₃ electrolyte film thickness of 5 μm could be operated at 400°C in the gas mixtures of hydrogen and oxygen and had a maximum open circuit voltage of 455 mV. However, a V-I property at 400°C of SC-SOFC was considerably poor as a development index of SOFC, because the cell resistance with a several kΩ was due mainly to the interface reaction resistance of between the Pt catalytic electrodes and an amorphous electrolyte film.