Journal of Electrochemical Science and Technology· 2020Q2· Review
Modeling and Applications of Electrochemical Impedance Spectroscopy (EIS) for Lithium-ion Batteries
- 1,156citations
- Q2SCImago
- 2020year
Short summary
A new mini-review details how to construct physically sound circuit models for lithium-ion batteries to interpret complex Electrochemical Impedance Spectroscopy (EIS) data.
AI-generated from the title and abstract; the full text is not read.
Key points
- Electrochemical Impedance Spectroscopy (EIS) is a convenient, quick, accurate, and low-cost diagnostic technique for secondary batteries.
- Complex EIS spectra require physically sound circuit models for meaningful analysis of the electrochemical environment.
- The review guides the construction of circuit models based on battery cell characteristics.
- It establishes relationships between circuit element resistances (R b , R ct , R SEI , W) and battery parameters (SOC, temperature, SOH).
AI-generated from the title and abstract; the full text is not read.
Abstract
As research on secondary batteries becomes important, interest in analytical methods to examine the condition of secondary batteries is also increasing. Among these methods, the electrochemical impedance spectroscopy (EIS) method is one of the most attractive diagnostic techniques due to its convenience, quickness, accuracy, and low cost. However, since the obtained spectra are complicated signals representing several impedance elements, it is necessary to understand the whole electrochemical environment for a meaningful analysis. Based on the understanding of the whole system, the circuit elements constituting the cell can be obtained through construction of a physically sound circuit model. Therefore, this mini-review will explain how to construct a physically sound circuit model according to the characteristics of the battery cell system and then introduce the relationship between the obtained resistances of the bulk (R b ), charge transfer reaction (R ct ), interface layer (R SEI ), diffusion process (W) and battery characteristics, such as the state of charge (SOC), temperature, and state of health (SOH).
The authors' abstract, as published at the source. Journal of Electrochemical Science and Technology, 2020 · DOI ↗
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