锂离子电池在放电过程中的阻抗变化

Monatshefte für Chemie / Chemical Monthly Pub Date : 2024-03-05 DOI:10.1007/s00706-024-03175-7

Petr Křivík

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摘要

本文涉及锂离子 NCR18650B 电池放电过程中电池阻抗参数的测量。采用 PEIS 方法测量了电池的 Re (Z) 和 Im (Z)。放电和充电过程中的阻抗变化结果绘制成奈奎斯特图。在使用和未使用 CPE 元件的锂离子电池放电过程中，发现了一些重要值，即 Rs、Rsei、Rct、Csei、Qsei、Cdl、α 和 σ。

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Impedance changes of the Li-ion cell in the course of discharge

The paper deals with the measurement of the cell impedance parameters during discharging of the Li-ion NCR18650B cell. Re (Z) and Im (Z) of the battery were measured by PEIS method. The results of the impedance changes during discharging and charging were plot to Nyquist diagrams. The important values namely Rs, Rsei, Rct, Csei, Qsei, Cdl, α, and σ were found during discharging of the Li-ion cell with and without using CPE element.

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Monatshefte für Chemie / Chemical Monthly

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