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Measuring ionic conductivity in electrodes prepared by solvent-free melt extrusion.

Charlotte Sorel¹, Paul Nicolle¹, Gabrielle Foran¹

¹Université de Montréal, 1375 avenue Thérèse-Lavoie-Roux, Montréal, Québec, Canada, H2V 0B3. mickael.dolle@umontreal.ca.

Chemical Communications (Cambridge, England)

|June 16, 2026

Summary

This study introduces a reliable method for measuring ionic conductivity in battery electrodes. The technique focuses on formulations utilizing thermoplastic vulcanizates, crucial for efficient charge transfer in batteries.

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Area of Science:

Materials Science
Electrochemistry
Polymer Science

Background:

Battery electrodes require simultaneous electron and ion conductivity for effective charge transfer.
Current electrode formulations combine ion-conducting polymeric binders and electronically conductive carbon.
Thermoplastic vulcanizates (TPVs) are explored as potential components in advanced battery electrode designs.

Purpose of the Study:

To develop and present a reproducible method for quantifying the ionic conductivity of battery electrodes.
To evaluate the ionic conductivity of electrode formulations incorporating thermoplastic vulcanizates.
To establish a reliable measurement technique for optimizing electrode performance in energy storage devices.

Main Methods:

Development of a novel technique for ionic conductivity measurement in composite electrode materials.
Fabrication of battery electrode samples using formulations containing thermoplastic vulcanizates.
Systematic characterization of ionic transport properties within the prepared electrodes.

Main Results:

A reproducible method for measuring ionic conductivity in TPV-containing electrodes was successfully established.
The ionic conductivity of electrodes formulated with thermoplastic vulcanizates was quantitatively assessed.
The presented technique provides reliable data for understanding ion transport in these specific electrode compositions.

Conclusions:

The developed technique offers a reproducible approach to measure ionic conductivity in battery electrodes.
Thermoplastic vulcanizates can be incorporated into electrode formulations, and their ionic conductivity can be reliably measured.
This work contributes to the understanding and optimization of materials for advanced electrochemical energy storage.