等效回路法在离子液体电极效应中的应用  

Application of the equivalent circuit model in electrode effect of ionic liquid

作　　者：毕岚[1] 梁忠诚[2] 

机构地区：[1]南京邮电大学理学院,江苏南京210046 [2]南京邮电大学光电学院,江苏南京210046

出　　处：《大学物理》2013年第1期21-24,共4页College Physics

摘　　要：利用等效电回路模型简化离子液体的电极系统,分析了电极效应中出现的3个特征频率和各自表征的物理意义.基于离子液体介电谱实验数据,获取了等效电回路的基本参数:本体电容、本体电阻和电双层电容,进而得到离子液体样品和电双层的基本介电参数,以及与离子迁移相关的物性参数如扩散系数、迁移率、离子液体中有效离子浓度,对深入理解离子液体导电和界面机制有重要的意义.The system of ionic liquid and electrode is simplified by the model of equivalent circuit and threecharacteristic frequencies and physical meanings in electrode polarization effects are analyzed. Based on dielectric spectroscopy data, we obtain the basic equivalent circuit parameters： bulk capacitance, bulk resistance and double layer capacitance, dielectric parameters of ionic liquid and electrical double layer, as well as physical parameters related on ion mobility： diffusion coefficient, mobility, effect number density, which play the important significance in depth understanding charge transport mechanism and electrical double layer property of ionic liquid.

关 键 词：离子液体 等效回路 电极效应 电双层 介电谱 

分 类 号：O441[理学—电磁学]