A Comprehensive Physical‐Based Sensitivity Analysis of the Electrochemical Impedance Response of Lithium‐Ion Batteries,Energy Technology

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A Comprehensive Physical‐Based Sensitivity Analysis of the Electrochemical Impedance Response of Lithium‐Ion Batteries
Energy Technology ( IF 3.6 ) Pub Date : 2021-01-05 , DOI: 10.1002/ente.202000986
Claudio Rabissi ₁ , Alessandro Innocenti _{2,

3} , Gabriele Sordi ₁ , Andrea Casalegno ₁

Affiliation

The electrochemical impedance spectroscopy (EIS) characterization technique, although widely adopted in electrochemistry for understanding operational issues and degradation, has a less consolidated physical interpretation in lithium‐ion batteries (LIBs), often relying on circuital methods. Herein, the Doyle–Fuller–Newman model is adapted and experimentally validated for the physical simulation of electrochemical impedance; then, it is applied in a comprehensive one‐factor‐at‐time sensitivity analysis on an impedance spectrum from 4 kHz to 0.005 Hz; 28 physical parameters, which represent the kinetic, resistive, diffusive, and geometric characteristics of the battery, are varied within broad literature‐based ranges of values, for each of the 20 analyzed battery states, characterized by different state‐of‐charge and temperature values. The results show a miscellaneous sensitivity of parameters on impedance spectra, which ranges from highly sensitive to negligible, often resulting in a strong dependence on operating conditions and impedance frequency. Such results consolidate the understanding of LIB electrochemical impedance and demonstrate that 40% of the parameters, 12 out of 28, can be considered poorly sensitive or insensitive parameters; therefore, fitting the experimental EIS data, their value can be assumed from the literature without significantly losing accuracy.

中文翻译：

锂离子电池电化学阻抗响应的基于物理的综合灵敏度分析

电化学阻抗谱（EIS）表征技术虽然在电化学中广泛用于理解操作问题和降解，但在锂离子电池（LIB）中的物理解释较少，通常依赖于电路方法。在这里，Doyle-Fuller-Newman模型被修改并通过实验验证了电化学阻抗的物理模拟。然后，将其应用于从4 kHz到0.005 Hz的阻抗频谱的全面的一次因素灵敏度分析；代表电池的动力学，电阻，扩散和几何特性的28个物理参数在广泛的基于文献的值范围内变化，对于20种分析的电池状态中的每一种，其特征在于不同的充电状态和温度价值观。结果表明，阻抗谱上参数的其他灵敏度范围从高灵敏度到可忽略不计，通常导致对工作条件和阻抗频率的强烈依赖。这样的结果巩固了对LIB电化学阻抗的理解，并证明了40％的参数（28个参数中的12个）可以被认为是敏感或不敏感的参数。因此，拟合实验EIS数据，可以从文献中假设其值，而不会显着降低准确性。这样的结果巩固了对LIB电化学阻抗的理解，并证明了40％的参数（28个参数中的12个）可以被认为是敏感或不敏感的参数。因此，拟合实验EIS数据，可以从文献中假设其值，而不会显着降低准确性。这样的结果巩固了对LIB电化学阻抗的理解，并证明了40％的参数（28个参数中的12个）可以被认为是敏感或不敏感的参数。因此，拟合实验EIS数据，可以从文献中假设其值，而不会显着降低准确性。

更新日期：2021-03-04

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