The Transmission Line Model from De Levie

De Levie was the first to describe the electrochemical behavior of porous electrodes [27], We will not present here the details of the mathematical treatment developed by De Levie, and we ask the reader to refer to his papers [27,30] for more information. However, we will present a summary of the results obtained by De Levie that have been of great importance for the understanding of the electrochemistry at porous electrodes as a whole, not just for EDLC applications. 

Carbons for Electrochemical Energy Storage and Conversion Systems 

FIGURE 1.23 Complex-plane impedance plot for a 2.3V/10F supercapacitor laboratory cell using acetonitrile-based electrolyte. Bias voltage = 0 V room temperature. 

FIGURE 1.24 (a) Schematic representation of a porous solid electrode (here a carbon electrode) assuming 

This model proposed by De Levie [27,30] has been updated several times during the last decades, taking into account, for instance, the pore shape [31] or the distribution of pores with nonuniform size [32] however, today, it is of great interest since the set of equations and the model proposed by De Levie allow a rapid characterization of the frequency behavior of the EDLCs. 

---