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This is a In Vitro Study study (also classified as: Observational).

August 17, 2025Open Access

Use of Electrochemical Impedance Spectroscopy, Capacity, and Electrochemical Noise Measurements to Study Aging of Lithium-Ion Batteries

ABAbdelfattah BoukhssimUniversité du littoral côte d'opale HYHassan YassineUniversité du littoral côte d'opale GLG. LeroyCentre National de la Recherche Scientifique

Key Points

Aging of lithium-ion batteries leads to increased electrode resistance, affecting performance and lifespan.
After 800 charge/discharge cycles, studies show a linear increase in resistance correlating with capacity fading.
Using electrochemical techniques like impedance spectroscopy, the aging effects from different C-rates were assessed.
Noise measurements reveal elevated low-frequency noise levels, indicating further degradation during battery life.

Abstract

Aging studies of lithium-ion batteries are essential for understanding material degradation, which impacts performance and, consequently, battery lifespan. In this paper, we propose the use of electrochemical impedance spectroscopy, differential capacity analysis, and electrochemical noise measurements to evaluate the effects of different C-rates (2C, C/2, and C/20) on a cell. We study aging up to 800 charge/discharge cycles. We demonstrate that aging is associated with a linear increase in electrode resistance, which correlates with capacity fading. Additionally, noise measurements indicate a rise in noise levels at low frequencies following a 1/fγ trend with 1<γ<2.

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