Unveiling the aging memory effect in Lithium-ion batteries: A thermodynamic approach

IF 3 4区材料科学 Q3 CHEMISTRY, PHYSICAL

Solid State Ionics Pub Date : 2025-02-01 DOI:10.1016/j.ssi.2024.116767

Kenza Maher, Ameni Boumaiza

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引用次数: 0

Abstract

We discovered that lithium-ion batteries (LIBs) retain a thermodynamic trace of their aging process, a phenomenon referred to here as the “aging memory effect.” This memory effect can be revealed by measuring the entropy and enthalpy of aged cells at two well-defined open-circuit potentials (OCP):

E_{0}^{1}

= 3.87 V and

E_{0}^{2}

= 3.94 V.

The study examined LIB cells consisting of graphite anode and lithium cobalt oxide (LCO) cathode. We observed that the variation in entropy and enthalpy at

E_{0}^{1}

and

E_{0}^{2}

, strongly depends on the cells' aging history.

E_{0}^{1}

and

E_{0}^{2}

correspond to the potential onset of the phase transitions in the anode and cathode materials, respectively. These phase transitions serve as critical indicators that reflect the internal alterations and degradation mechanisms occurring within the battery over time. By meticulously monitoring the entropy and enthalpy changes at

E_{0}^{1}

and

E_{0}^{2},

we can retrace the battery's aging memory and identify the capacity-limiting electrode. Our findings indicate that these thermodynamic measurements can provide detailed insights into the electrodes' degradation pathways and phase transition behaviors. This knowledge is crucial for developing strategies to enhance the longevity and performance of LIBs.

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来源期刊

Solid State Ionics 物理-物理：凝聚态物理

CiteScore

6.10

自引率

3.10%

发文量

152

审稿时长

58 days

期刊介绍： This interdisciplinary journal is devoted to the physics, chemistry and materials science of diffusion, mass transport, and reactivity of solids. The major part of each issue is devoted to articles on: (i) physics and chemistry of defects in solids; (ii) reactions in and on solids, e.g. intercalation, corrosion, oxidation, sintering; (iii) ion transport measurements, mechanisms and theory; (iv) solid state electrochemistry; (v) ionically-electronically mixed conducting solids. Related technological applications are also included, provided their characteristics are interpreted in terms of the basic solid state properties. Review papers and relevant symposium proceedings are welcome.