The performance of lithium-ion batteries can be analyzed and improved by appropriate electrochemical models. A challenging yet crucial part is the parameterization of these models. Until now, the literature has incompletely investigated and cited the charge transfer process parameters describing the lithium transfer between the active material particles in the electrode and the liquid electrolyte. Herein, a novel approach is presented for obtaining these charge transfer parameters. The well-established experimental methods of electrochemical impedance spectroscopy and focused ion beam tomography are applied. By introducing both experimental results into a transmission line model, a reliable determination of the charge transfer parameters j₀, k, and r_CT can be achieved. The new approach is validated by comparing the results of four cathodes, all containing the state-of-the-art active material Ni_xMn_yCo_1−x−y (NMC), but with different microstructures and/or stoichiometries.

中文翻译：

---

通过传输线建模方法评估 NixMnyCo1-x-y 阴极的电荷转移参数

锂离子电池的性能可以通过适当的电化学模型进行分析和改进。一个具有挑战性但至关重要的部分是这些模型的参数化。到目前为止，文献还没有完整地研究和引用描述电极中活性材料颗粒和液体电解质之间的锂转移的电荷转移过程参数。在此，提出了一种用于获得这些电荷转移参数的新方法。应用了电化学阻抗谱和聚焦离子束断层扫描的成熟实验方法。通过将这两个实验结果引入传输线模型，电荷转移参数j ₀、k和r的可靠确定_CT可以实现。新方法通过比较四种阴极的结果得到验证，所有阴极都包含最先进的活性材料 Ni _x Mn _y Co _{1− x − y} (NMC)，但具有不同的微观结构和/或化学计量。