Main Properties of Electric Double-Layer Capacitors EDLC

2 MAIN PROPERTIES OF ELECTRIC DOUBLE-LAYER CAPACITORS (EDLC) 

EDLC consists of two porous polarizable electrodes. The process of energy saving in EDLC is based on charge separation on two electrodes with a sufficiently high difference of potentials between them. The electric charge of EDLC is determined by 

Eg represents the electrode surface //is EDL, where the charge is accumulated on both sides C and A are cations and anions of electrolyte, respectively. 

Theoretical concepts of specific (per unit true electrode surface area) EDL capacitance are based on the known classical theories of EDL developed by Helmholtz, Stern, Gouy-Chapman, Grahame, and so on. One of the directions of modem smdies of EDL is elucidation of ratios between different surface layer characteristics. These include specific capacitances in zero charge points, electronic work functions of metals, their liophilicity, zero charge potentials. Correlations are established between many of these characteristics in a number of metals and solvents. At the same time, there are significant deviations from main trends. Zero charge points were first determined for different carbon materials in the works of Frumkin et al. 

For EDLCs, same as for all ideal capacitors, capacitance is inversely proportional to the thickness of a capacitor plate  

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