Introduction to Electrochemical Impedance Spectroscopy as a Measurement Method for the Wetting Degree of Lithium-Ion Cells
Introduction to Electrochemical Impedance Spectroscopy as a Measurement Method for the Wetting Degree of Lithium-Ion Cells
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介绍电化学阻抗谱作为锂离子电池润湿度测量方法
DOI：
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发表时间：
2018
期刊：
影响因子：
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通讯作者：
G. Reinhart
中科院分区：
文献类型：
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作者：
Florian J. Günter;J. B. Habedank;David Schreiner;T. Neuwirth;R. Gilles;G. Reinhart
在锂离子电池的生产工艺链中，电池及其组件的电解液填充（包括计量和润湿步骤）对于最终产品的质量和成本至关重要。为了减少填充和成型之间不必要的润湿时间，从而降低生产成本，需要一种润湿进度的测量方法。在本文中，电化学阻抗谱（EIS）作为一种成熟的技术首次被用来量化电池生产过程中电池的润湿程度。在剂量和随后的润湿过程中获得的 EIS 实验数据与原位中子射线照相术记录的图像相关。结果表明，电池单元的阻抗很大程度上取决于电池组件的润湿程度，因此可用于确定完全润湿状态，从而实现更快的处理。©TheAuthor(s)
In the production process chain of lithium-ion battery cells, the filling, consisting of dosing and wetting steps, of the cell and its components with electrolyte liquid is eminent for the final product quality and costs. To reduce the unnecessary wetting duration between filling and formation, and thereby the production costs, a measurement method for the wetting progress is necessary. In this paper, electrochemical impedance spectroscopy (EIS) as a well-established technique is used for the first time to quantify the wetting degree of batteries during cell production. The experimental data of the EIS acquired during the dosing and subsequent wetting process is correlated to images recorded by in situ neutron radiography. Results show that the impedance of the battery cells strongly depends on the wetting degree of the cell assembly and can thus be used to determine the fully wetted state enabling faster processing.©TheAuthor(s)