Parameter Determination

Design of experiments to determine transport parameter of a porous media and kinetic parameters of energy storage and conversion materials

Enabling 3D structuring of battery electrodes:

For traditional battery designs based on homogeneous nonstructured porous electrodes, the through-plane tortuosity is the most relevant parameter describing ion conduction in the electrolyte phase, as it is dominated by through-plane conduction. However, modeling and optimization of the more recently proposed three-dimensionally (3D) structured electrode designs requires the values of both the inplane and the through-plane tortuosity. Examples are interdigitated battery architectures and laser structured electrodes, where the transport of lithium ions is not restricted to the through-plane direction.

An elegant method to determine the in-plane transport resistance (in-plane tortuosity) is shown in figure below and covered extensively in the publication:

B. Suthar, J. Landesfeind, A. Eldiven, H. A. Gasteiger, Method to Determine the In-Plane Tortuosity of Porous Electrodes. J. Electrochem. Soc. 165, A2008-A2018 (2018). (Link)