Technical Papers and Presentations

The purpose of this work is to show whether an important difference in Lithium solid concentration and electrolyte concentration can be observed in a Lithium-ion battery model, when considering either the Butler-Volmer kinetics or the Tafel kinetics for describing the electrode kinetics (including a boundary layer between the electrolyte and the electrode particles). During discharge, the lithium ions insert into solid particles of the positive electrode and de-insert from the solid particles of the negative electrode. We have observed that the differences in the results, between using the Tafel kinetics and the Butler-Volmer kinetics, imply that neglecting low overpotential is not to be suggested in Lithium-ion batteries of the kind studied in this work.