Wg. Pell et Be. Conway, Analysis of power limitations at porous supercapacitor electrodes under cyclic voltammetry modulation and dc charge, J POWER SOU, 96(1), 2001, pp. 57-67
Citations number
22
Categorie Soggetti
Physical Chemistry/Chemical Physics","Environmental Engineering & Energy
A simple capacitor is perceived as being capable of discharge (or recharge)
at high rates, limited only by a small equivalent series resistance. Howev
er. in the case of electrochemical capacitors, based on high specific area
porous electrode materials, power limitations: arise due to the complex-dis
tribution of electrolyte internal resistance, coupled with double-layer or
pseudo-capacitative elements. The present paper quantitatively examines bot
h numerically and experimentally the effects of internal electrolyte resist
ance as evaluated by the current-response functions for porous capacitor el
ectrodes. generated in cyclic voltammetry (CV) experiments and for voltage
versus time responses in dc charge/discharge regimes. (C) 2001 Elsevier Sci
ence B.V. All rights reserved.