Fractional equivalent impedance of electrochemical double layer capacitors combinations

Abstract

This paper provides a Fractional Equivalent Impedance for combinations of Electrochemical Double Layer Capacitors (EDLCs). The application of the fractional calculus for modeling EDLCs is a novel way to get simpler and more precise models. On using the impedance spectroscopy method, experimental results for different EDLC combinations have been obtained. It has been developed a model which characterizes any EDLC combinations, series or parallel, of the same manufacturer. It is exposed that for the same manufacturer technology the proposed model is only a function of the capacity. The results obtained show an excellent fitting on the overall frequencies analyzed. © 2008 Lavoisier, Paris.