To understand battery systems, simulation tools are often employed. For a high level of accuracy and reliability, these tools need accurate values of relevant physico-chemical parameters of the materials being involved. In case of binary electrolyte solutions, at least four different concentration- and temperature-dependent transport parameters are required: the (ionic) conductivity, the binary diffusion coefficient, the transference number, and the thermodynamic factor.
In previous application notes, we showed how to determine transference numbers and the binary diffusion coefficient. In this application note, we demonstrate how to determine the temperature-dependent ion conductivity of a binary lithium-ion battery electrolyte solution by means of (electrochemical) impedance spectroscopy (EIS).
To cite this application note, please use: “Drüschler et al., rhd instruments GmbH & Co. KG, Application Note: Determination of the temperature-dependent conductivity of a lithium-ion battery electrolyte by means of EIS, June 2020”.