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

BI Lan 1,LIANG Zhong-cheng 2(1.College of Mathematics and Physics,University of Posts and Telecommunications,Nanjing,Jiangsu 210046,China;2.College of Optoelectronic Engineering,University of Posts and Telecommunications,Nanjing,Jiangsu 210046,China)  
The system of ionic liquid and electrode is simplified by the model of equivalent circuit and three characteristic 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.
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