On the electrical double layer capacitance of the restricted primitive model: a link between the mesoscopic theory and the associative mean spherical approximation
DOI:
https://doi.org/10.5488/cmp.29.24601Keywords:
EDL capacitance, concentrated electrolytes, association, mesoscopic theory, associative mean spherical approximationAbstract
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.
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