Journal
JOURNAL OF POWER SOURCES
Volume 96, Issue 1, Pages 57-67Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/S0378-7753(00)00682-0
Keywords
electrochemical capacitors; internal resistance; cyclic voltammetry; charge/discharge curves
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A simple capacitor is perceived as being capable of discharge (or recharge) at high rates, limited only by a small equivalent series resistance. However. in the case of electrochemical capacitors, based on high specific area porous electrode materials, power limitations: arise due to the complex-distribution of electrolyte internal resistance, coupled with double-layer or pseudo-capacitative elements. The present paper quantitatively examines both numerically and experimentally the effects of internal electrolyte resistance as evaluated by the current-response functions for porous capacitor electrodes. generated in cyclic voltammetry (CV) experiments and for voltage versus time responses in dc charge/discharge regimes. (C) 2001 Elsevier Science B.V. All rights reserved.
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