电化学2013，Vol.19Issue(1)：79-82,4.
一些电化学交流阻抗复数平面图旋转的物理意义
The Physical Essential of the Rotation of Complex Impedance Diagram in Some Electrochemical Systems
吴秉亮1
作者信息
- 1. 武汉大学化学与分子科学学院,湖北武汉430072
- 折叠
摘要
Abstract
The essential of the rotation of complex impedance diagram in some electrochemical systems is discussed. It is attributing to that the electrochemical capacitance usual is not simple real capacitor but must be complex number capacitance. As the examples: 1, the metal/support electrolyte electrode in the ideal polarization condition, the capacitance must be that of the electrochemical double layer and represents complex number properties. Its complex impedance diagram was not a line parallel to imaginary axis but rotated clockwise α = arctgC"/C". 2, In the case of Li+ insertion/desertion electrodes, the capacitance must be that of the solid electrolyte interphase (SEI). The rotation of impedance diagram also was attributing to the complex number properties of the capacitance of SEI membrane. In general, the physical essential of these rotations was attributing to the dielectric dispersion of the relative capacitors. The measurement of the capacity and the rotation angle may be used to characterize the electric and the structure properties of the SEI.
关键词
交流阻抗/复数平面图旋转/复数电容/常相角元件/固体电解质中间相Key words
alternating current impedance/ rotation of complex impedance diagram/ complex capacitance/ constant phase element/ solid electrolyte interphase
分类
化学化工引用本文复制引用
吴秉亮..一些电化学交流阻抗复数平面图旋转的物理意义[J].电化学,2013,19(1):79-82,4.
