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Exploring the effects of aging, temperature and hysteresis on the entropy variation of lithium-ion batteries

Reiter A, Schütte M, Rosenmüller C, Stroebl F, Lehner S, Sauer DU, Bohlen O (2025)

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Publication Language: English

Publication Type: Journal article, Original article

Publication year: 2025

Journal

Book Volume: A

Pages Range: 1 - 15

Journal Issue: 140

URI: https://www.sciencedirect.com/science/article/pii/S2352152X25036102

DOI: 10.1016/j.est.2025.118897

Abstract

The entropy variation ∆S poses a fundamental characteristic of lithium-ion batteries due to its influence on their thermal behavior.This study presents an extensive open source dataset containing potentiometric entropy variation measurements on two commercially available cell types. The experimental campaign includes 20 temperature steps over 9 different SoCs approached in charging and discharging direction. Further measurements on half cell level were conducted in order to investigate the electrodes’ contribution to the full cell entropy. In addition, a reduced testing regime was applied to 9 degraded cells aged via various aging regimes.
The measurements were analyzed to quantify the influence of SoC, non-linearity, load-history-dependent and temperature-path-dependent hysteresis and aging on the entropy variation. Comparing the results to literature, the expected influence of both SoC and load-history-dependent hysteresis were confirmed. Regarding the influence of non-linearity, no significant effect was determined for the given dataset. In terms of temperature path-dependency, a loop-like relationship resembling common hysteresis phenomena was determined from the data. The reconstruction of the full cell entropy variation curve from half cell measurements was successfully conducted for cells in pristine condition, while its application on aged specimens proved difficult likely due to
challenges during determination of the electrode balancing.

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How to cite

APA:

Reiter, A., Schütte, M., Rosenmüller, C., Stroebl, F., Lehner, S., Sauer, D.U., & Bohlen, O. (2025). Exploring the effects of aging, temperature and hysteresis on the entropy variation of lithium-ion batteries. Journal of Energy Storage, A(140), 1 - 15. https://doi.org/10.1016/j.est.2025.118897

MLA:

Reiter, Alexander, et al. "Exploring the effects of aging, temperature and hysteresis on the entropy variation of lithium-ion batteries." Journal of Energy Storage A.140 (2025): 1 - 15.

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