GEOMETRIC REQUIREMENTS OF SOLID-ELECTROLYTE CELLS WITH A REFERENCE ELECTRODE

A range of solid electrolyte cell geometries has been evaluated in ter ms of their suitability for measurements of the working electrode pola rization resistance in a three-electrode configuration. The potential and current density distributions in the cells are calculated numerica lly. If the current density at the working electrode is not uniform, t he standard procedure of evaluating the electrode polarization resista nce from the experimental data is inadequate and may lead to erroneous results. Simulations are presented for cells with thin electrolytes a nd for pellet-based geometries with large electrolyte thickness.