A Mathematical Model of an Electrochemical Capacitor with Double-Layer and Faradaic Processes

Author(s)

Chuan Lin, University of South Carolina - ColumbiaFollow
James A. Ritter, University of South Carolina - ColumbiaFollow
Branko N. Popov, University of South Carolina - ColumbiaFollow
Ralph E. White, University of South Carolina - ColumbiaFollow

Document Type

Article

Subject Area(s)

Chemical Engineering

Abstract

A mathematical model of an electrochemical capacitor with hydrous ruthenium oxide (RuO₂·xH₂O) electrodes including both double-layer and surface faradaic processes is developed to predict the behavior of the capacitor under conditions of galvanostatic charge and discharge. The effect of RuO₂·xH₂O particle size is studied and shows that the smaller the particles the better the performance because of the increased surface area per unit volume or mass. The model also predicts that the faradaic process increases significantly the energy per unit volume of the capacitor for power densities of 100 kW/L or less.

Publication Info

Journal of the Electrochemical Society, 1999, pages 3168-3175.

Rights

© The Electrochemical Society, Inc. 1999. All rights reserved. Except as provided under U.S. copyright law, this work may not be reproduced, resold, distributed, or modified without the express permission of The Electrochemical Society (ECS). The archival version of this work was published in the Journal of the Electrochemical Society.

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Publisher's link: http://dx.doi.org/10.1149/1.1392450

DOI: 10.1149/1.1392450