Drummond, R. orcid.org/0000-0002-2586-1718, Tredenick, E. orcid.org/0000-0001-9105-2858, Kirk, T.L. et al. (3 more authors) (2025) Graded lithium-ion battery pouch cells to homogenise current distributions and reduce lithium plating. Journal of The Electrochemical Society, 172 (1). 010518. ISSN 0013-4651
Abstract
Spatial distributions in current, temperature, state-of-charge and degradation across the plane of large format lithium-ion battery pouch cells can significantly impact their performance, especially at high C-rates. In this paper, a method to smooth out these spatial distributions by grading the electrode microstructure in-the-plane is proposed. A mathematical model of a large format pouch cell is developed and validated against both temperature and voltage experimental data. An analytical solution for the optimal graded electrode that achieves a uniform current distribution across the pouch cell is then derived. The model predicts that the graded electrodes could significantly reduce the likelihood of lithium plating in large format pouch cells, with grading increasing the C-rate at which plating occurs from 2.4C to 4.3C. These results indicate the potential of designing spatially varying electrode architectures to homogenise the response of large format pouch cells and improve their high rate performance.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2025 The Author(s). Published on behalf of The Electrochemical Society by IOP Publishing Limited. This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 License (CC BY, https://creativecommons.org/ licenses/by/4.0/), which permits unrestricted reuse of the work in any medium, provided the original work is properly cited. |
Keywords: | Engineering; Materials Engineering; Chemical Sciences; Physical Chemistry |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Engineering (Sheffield) > School of Electrical and Electronic Engineering |
Funding Information: | Funder Grant number ROYAL ACADEMY OF ENGINEERING (THE) ICRF\113 |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 17 Jan 2025 11:36 |
Last Modified: | 19 Mar 2025 10:52 |
Status: | Published |
Publisher: | The Electrochemical Society |
Refereed: | Yes |
Identification Number: | 10.1149/1945-7111/ada751 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:221807 |
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