Analytical Solution for Flow-Through Porous Electrode Under Linear Polarization
Resource
Journal of the Electrochemical Society, v.133, p.1394
Journal
Journal of the Electrochemical Society
Journal Volume
v.133
Pages
139-4
Date Issued
1987
Date
1987
Author(s)
Abstract
A simple mathematical model was developed and used to calculate analytically key parameters such as overpotential distribution, concentration distribution, and local reaction rate distribution within a flow-through porous electrode. The model takes into account the activation control regime with low irreversibility. This is especially true in battery systems operating with high concentration of electrolytes where mass transfer is of secondary importance. Analytic expressions for the overpotential, concentration, and local reaction rate distributions are obtained under the assumption that the concentration overpotential is negligible (for the case of low irreversibility). The results are compared with a numerical solution which considers activation control regime without the limitation of low irreversibility. It is shown that the analytic solution along with the polarization curve can provide an alternative way in estimating the specific surface area available for the electrochemical reaction. The results can be used in the modeling of the zinc-chlorine battery and similar flow batteries under linear polarization. © 1986, The Electrochemical Society, Inc. All rights reserved.
SDGs
Type
journal article