Theoretical Analysis of Current Distribution in Porous Electrodes

John S. Newman, Charles W. Tobias
1962 Journal of the Electrochemical Society  
General equations describing the behavior of porous electrodes are developed. These equations are used to determine the initial and the steady-state conditions in one-dimensional porous electrodes of uniform geometry and polarization parameters. In particular, it is shown that the current and reaction distributions in the depth of the electrode are strongly influenced by the type of activation polarization and by mass transport of the reacting ionic species, in addition to the effective
more » ... vities of the two phases. It is found that a linear approximation to a Tafel curve leads to an inadequate description of actual behavior when the reaction is distributed nonuniformly in the depth of the electrode. I xJL X=O Fig. I. One-dimensional porous electrode 1183 ) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 207.241.231.82 Downloaded on 2018-07-20 to IP ) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 207.241.231.82 Downloaded on 2018-07-20 to IP ) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 207.241.231.82 Downloaded on 2018-07-20 to IP ) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 207.241.231.82 Downloaded on 2018-07-20 to IP
doi:10.1149/1.2425269 fatcat:zggismamarbepf5rbbxqafctfe