This mini-review discusses the principles and applications of electrochemical impedance spectroscopy (EIS) for analyzing lithium-ion batteries. The authors explain how to construct equivalent circuit models to interpret impedance spectra and correlate them to battery characteristics such as state of charge (SOC), temperature, and state of health (SOH).

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This mini-review offers a comprehensive overview of electrochemical impedance spectroscopy (EIS) and its application in the analysis of Li-ion batteries. The authors effectively explain the principles and methods involved in constructing equivalent circuit models, demonstrating various methods for impedance analysis and their correlations to battery cell characteristics. The review provides useful information for researchers interested in EIS and Li-ion battery diagnostics, while some minor limitations in the discussion depth and inclusion of recent advancements prevent it from achieving a full 5-star rating.