As electrification continues to reshape industries, the power tool sector is expected to increasingly replace gasoline-driven equipment with battery-powered solutions. To maintain flexibility and productivity, the batteries must support fast charging. However, under low-temperature conditions and high charging currents, lithium-ion batteries face an increased risk of lithium plating, a phenomenon that can cause, among other issues, accelerated aging. [1] [2] Detection and ideally prevention of lithium plating are therefore essential to achieve both rapid and gentle charging.

This work explores the application of Dynamic Electrochemical Impedance Spectroscopy (DEIS) as a diagnostic method for identifying lithium plating during the charging process, as first shown by Koseoglou et al. [2]. Unlike conventional EIS techniques, DEIS enables continuous impedance monitoring without interrupting the charging process, offering a major advantage for real-world applications. [2] The theoretical foundation of this method lies in the characteristic reduction of specific impedance components during the onset of lithium plating, which allows early real-time detection. [2] The poster provides a comprehensive overview of the DEIS methodology and its application to lithium plating, highlighting its impact on impedance behavior. It also sets the method into context by comparing it with other approaches. Results are presented for both experimental and commercial cells. Beyond own experimental results, the current state of the literature is considered to establish a thorough understanding and to assess the potential of DEIS for in-operando plating detection and intervention. These insights aim to pave the way for reliable faster charging protocols without compromising battery health.

[1] C. Uhlmann, J. Illig, M. Ender, R. Schuster, E. Ivers-Tiffée, “In situ detection of lithium metal plating on graphite in experimental cells”, Journal of Power Sources, vol. 279, pp. 428–438, 2015.
[2] M. Koseoglou, E. Tsioumas, D. Ferentinou, N. Jabbour, D. Papagiannis, C. Mademlis, “Lithium plating detection using dynamic electrochemical impedance spectroscopy in lithium-ion batteries”, Journal of Power Sources, vol. 512, 230508, 2021.