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The electrode tortuosity factor: why the conventional tortuosity factor is not well suited for quantifying transport in porous Li-ion battery electrodes and what to use instead

Engineering and Technology

The electrode tortuosity factor: why the conventional tortuosity factor is not well suited for quantifying transport in porous Li-ion battery electrodes and what to use instead

T. Nguyen, A. Demortière, et al.

This paper by Tuan-Tu Nguyen and colleagues presents a novel numerical approach that challenges conventional methods for determining tortuosity factors in porous Li-ion battery electrodes. By introducing a new 'electrode tortuosity factor,' the research uncovers critical insights into how non-percolating pores impact performance, paving the way for optimized electrode design. The simulation tool is also available as an open-source MATLAB application.

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Playback language: English
Abstract
This paper presents a numerical approach to compare two common experimental methods for determining tortuosity factors in porous Li-ion battery electrodes. It highlights issues with the conventional "flow through" tortuosity factor and introduces a new "electrode tortuosity factor" that better captures relevant transport processes. Simulations demonstrate the importance of non-percolating pores in electrode performance, offering insights for optimizing electrode design. The simulation tool is available as an open-source MATLAB application.
Publisher
npj Computational Materials
Published On
Aug 14, 2020
Authors
Tuan-Tu Nguyen, Arnaud Demortière, Benoit Fleutot, Bruno Delobel, Charles Delacourt, Samuel J. Cooper
Tags
tortuosity factors
Li-ion battery
porous electrodes
simulation
non-percolating pores
electrode design
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