Variational models of pore networks in ionomer membranes: The role of electrostatics
Document Type
Conference Proceeding
Publication Date
12-1-2012
Abstract
We present a self-consistent, dynamic model for the morphology of the pore networks which form in Nafion and other ionomer membranes when they imbibe solvent. The model incorporates the interactions of the tethered ionic groups with the solvent and the entropic energy of the counter ions. Numerical simulations are presented which display hysteresis, and the development of pearled pore structures. A framework for extensions of the model that couple the electrostatic double layer at the interface of the pore wall and the transport equations for the counter-ions is presented. The framework derives the ionic transport and generalized Poisson equation from an action whose gradient flows dissipate a related free energy, in agreement with the second law of thermodynamics. © The Electrochemical Society.
Publication Title
ECS Transactions
Recommended Citation
Promislow, K.,
Jones, J.,
Xu, Z.,
Gavish, N.,
&
Christlieb, A.
(2012).
Variational models of pore networks in ionomer membranes: The role of electrostatics.
ECS Transactions,
50(2), 161-173.
http://doi.org/10.1149/05002.0161ecst
Retrieved from: https://digitalcommons.mtu.edu/michigantech-p/12624