Although the three-electrode electrochemical cell is considered to be a powerful cell configuration for electrochemical impedance measurements, many researchers have extensively used the two-electrode electrochemical cell for the sake of convenience. In this work, the impedance of the lithium metal counter electrode that is frequently used to explore the electrochemical properties of the working electrode containing active materials in the field of lithium batteries was measured on the basis of a threelectrode electrochemical cell, and its contribution to the full cell impedance was carefully investigated. In particular, the effect of the counter electrode on the full cell impedance was quantitatively analyzed in the cases of cell aging and a low cell temperature. From the experimental results, it was demonstrated that inappropriate conclusions might be drawn in the case where a two-electrode electrochemical cell configuration is used to explore the impedance behavior of the active materials.

尽管三电极电化学电池被认为是用于电化学阻抗测量的功能强大的电池配置，但为方便起见，许多研究人员已广泛使用两电极电化学电池。在这项工作中，在三电极电化学电池的基础上，测量了锂金属对电极的阻抗，该阻抗经常用于探索含活性材料的工作电极在锂电池领域的电化学性能，并且对它的贡献进行了测量。仔细研究了全电池阻抗。尤其是，在电池老化和电池温度低的情况下，对电极对整个电池阻抗的影响进行了定量分析。从实验结果来看