Journal of The Electrochemical Society · 1999 · 14 citations · 0 references
EngineeringChemical EngineeringMaterials ScienceElectrochemical EngineeringElectrochemistryInorganic ChemistryElectrochemical CellsElectrochemical KineticsElectrode KineticsFuel CellsOxygen TransferOxygen TransportCurrent DensityDiffusion Through OxidesElectrochemical MeasurementsOxygen DiffusionSolid Oxide Fuel CellsSteady-state CurrentSurface Reaction MechanismsVacancy Diffusion
The oxygen permeation flux measured as the oxide ion current density through was determined at steady state by using an electrochemical method in the range from to at T = 1273 K. The oxygen vacancy diffusion coefficient is estimated to be in the region from 1 to . When is lower than , seems to depend on a surface reaction as the rate‐determining step. The contribution of grain‐boundary diffusion on permeation was considered in the oxidizing atmosphere. The oxygen permeation current density through a 1 mm thick plate is estimated as in the solid oxide fuel cell operation. © 1999 The Electrochemical Society. All rights reserved.