ChemInform Abstract: Properties of Partially Stabilized Zirconia Fuel Cell.

ChemInform Abstract

The electrochemical properties of a solid oxide fuel cell containing a thin sheet of partially stabilized zirconia (PSZ, 3 mol% Y₂O₃) as electrolyte, a La_0.9Sr_0.1MnO₃ cathode and a Ni/ZrO₂ cermet anode are studied. The conductivity of the PSZ sheet is found to be 0.04 Ω^-1 cm^-1 at 1000 °C and no significant degradation is observed when the sample is held for 100 h at this temp. in air. This annealing results in a slight increase in the molar fraction of the tetragonal phase. The measured open-circuit voltages are 1.33 V for nonhumidified hydrogen as anode gas and 1.10 V for humidified hydrogen. Using a tape casted PSZ electrolyte, a maximum current density of 1.9 A/cm² is obtained.