Analysis of the Dynamic Behavior of Flooded Porous Electrodes

Abstract

Abstract A one dimensional model is developed to represent flooded porous electrodes in which there is no bulk flow of electrolyte in the pores. The model includes consideration of changes in composition and conductivity of the electrolyte with depth in the pores. Electrode reactions characterized by overpotential expressions of quite arbitrary form can be treated. Analysis is conducted by numerical techniques to furnish descriptions of electrode behavior for both steady state and transient operation. Electrode overpotential, and current and concentration distributions, are predicted as functions of operating conditions. The calculation procedure is implemented with digital computing machinery. Examples based on a metal‐metal oxide anode in basic solution and on a redox electrode in excess inert electrolyte are investigated. General characteristics of porous electrode performance are discussed.