Conductance of concentrated electrolytes: multivalency and the Wien effect
- Resource Type
- Working Paper
- Authors
- Avni, Yael; Andelman, David; Orland, Henri
- Source
- J. Chem. Phys. 157, (2022): 154502
- Subject
- Condensed Matter - Soft Condensed Matter
Condensed Matter - Materials Science
Condensed Matter - Statistical Mechanics
Physics - Chemical Physics
- Language
The electric conductivity of ionic solutions is well understood at low ionic concentrations of up to a few millimolar but becomes difficult to unravel at higher concentrations that are still common in nature and technological applications. A model for the conductivity at high concentrations was recently put forth for monovalent electrolytes at low electric fields. The model relies on applying a stochastic density-functional theory and using a modified electrostatic pair-potential that suppresses unphysical, short-range electrostatic interactions. Here, we extend the theory to multivalent ions as well as to high electric fields where a deviation from Ohm's law known as the Wien effect occurs. Our results are in good agreement with experiments and recent simulations.
Comment: 19 pages, 11 figures