The analysis of electrode polarisation (I-V) measurements of oxygen electrodes on δ-Bi2O3-based solid electrolytes is complicated by an ohmic polarisation correction which is of the order of the electrode resistance. The analysis can be performed with a NLLS fit technique, which includes this correction resistance, Ru, as adjustable parameter. By an appropriate choice of the electrode geometry the factor Ru can be minimized.
Boukamp, B. A., Vinke, I. C., Seshan, K., de Vries, K. J., & Burggraaf, A. J. (1988). Influence of electrode geometry and NLLS fit analysis of I-V measurements in a three-electrode cell. Solid state ionics, 28-30(Part 2), 1187-1191. https://doi.org/10.1016/0167-2738(88)90354-2