On the electrical double layer capacitance of the restricted primitive model: a link between the mesoscopic theory and the associative mean spherical approximation

Abstract

The results for the electrical double layer capacitance and the density of ``free ions'' obtained from the mesoscopic theory are compared with the corresponding results of the associative mean spherical approximation. While the first theory takes into account the fluctuations of the charge density, the second theory assumes that the free ions and ion pairs are in chemical equilibrium according to the mass action law. Our results demonstrate a fairly good agreement between the two theories at high densities and low temperatures.

6 pages, 2 figures

References in corpus (10)

• The Electrostatic Screening Length in Concentrated Electrolytes Increases with Concentration
• Underscreening in concentrated electrolytes
• Screening length for finite-size ions in concentrated electrolytes
• Primitive Model Electrolytes in the Near and Far Field: Decay Lengths from DFT and Simulations
• Anomalous Underscreening in the Restricted Primitive Model
• Capacitance and Structure of Electric Double Layers: Comparing Brownian Dynamics and Classical Density Functional Theory
• Simple theory for oscillatory charge profile in ionic liquids near a charged wall
• Correct scaling of the correlation length from a theory for concentrated electrolytes
• Primitive models of room temperature ionic liquids. Liquid-gas phase coexistence
• Mutual effect of charge- and number-density correlations in ionic liquids and concentrated electrolytes