Impedance of specificlly iodine adsorbed activated carbon materials

Abstract

In the work, for the first time, the impedance analysis of electrodes based on microporous activated carbon materials (AСM) at anodic polarization 0.3-0.5 V relative to hydrogen in 25 % ZnI2 was made. Received a good match of experimental data with linear impedance transmission circuit of porous electrode and circuit parameters are defined. Circuit parameters settings showed high values of specific pseudocapacitance ACM from 008 to 9.6 Fm-2 for small values of the time constant (τ) 1-193 s at anodic polarization. The results of the research allow to the specific adsorption mechanism of iodine on the surface nanoporous ACM and the ability of the investigated electrodes up to high power and energy characteristics of molecular systems of energy storage.