Double layer in ionic liquids: overscreening versus crowding.

By Martin Z. Bazant, Brian D. Storey, A. Kornyshev. Physical Review Letters, 2010

822 citations recorded by the source corpus.

We develop a simple Landau-Ginzburg-type continuum theory of solvent-free ionic liquids and use it to predict the structure of the electrical double layer. The model captures overscreening from short-range correlations, dominant at small voltages, and steric constraints of finite ion sizes, which prevail at large voltages. Increasing the voltage gradually suppresses overscreening in favor of the crowding of counterions in a condensed inner layer near the electrode. This prediction, the ion profiles, and the capacitance-voltage dependence are consistent with recent computer simulations and experiments on room-temperature ionic liquids, using a correlation length of order the ion size.

Subfields: Catalysis, Electrochemistry, Physical and Theoretical Chemistry

View Paper: https://www.semanticscholar.org/paper/21e87f2f383bff3f6ddfaef82752a10ea95401de

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Catalysis

1. Guang Feng
2. Zachary A H Goodwin
3. Hartmut Löwen
4. Michael te Vrugt
5. Raphael Wittkowski
6. A. Kornyshev

In Electrochemistry

1. Guang Feng
2. Zachary A H Goodwin
3. Hartmut Löwen
4. Michael te Vrugt
5. Raphael Wittkowski
6. A. Kornyshev

In Physical and Theoretical Chemistry

1. Guang Feng
2. Zachary A H Goodwin
3. Hartmut Löwen
4. Michael te Vrugt
5. Raphael Wittkowski

Citations in the corpus

• Classical dynamical density functional theory: from fundamentals to applications (2020, methodology): “ standard PNP equations do not include excluded-volume eects and are therefore valid only in the dilute limit [791,972{975]. A phenomenological solution to this problem was proposed by Bazant et al. [976]. To give a more accurate description, DDFT is used to model the ions as charged hard spheres [4”