Application of the SRISM approach to the study of the capacitance of the double layer of a high density primitive model electrolyte

Details Application of the SRISM approach to the study of the capacitance of the double layer of a high density primitive model electrolyte Application of the SRISM approach to the study of the capacitance of the double layer of a high density primitive model electrolyte

2012-02-22

arxiv.org/abs/1202.4843v1

Condens. Matter Phys., 2011, vol. 14, No. 4, p. 43801:1-6

Physics

Condensed Matter

Soft Condensed Matter

6 pages, 2 figures

Scientific paper

10.5488/CMP.14.43801

In this study the Singlet Reference Interaction Site Model (SRISM) is employed to the study of the electrode charge dependence of the capacitance of a planar electric double layer using the primitive model of the double layer for a high density electrolyte that mimics an ionic liquid. The ions are represented by charged hard spheres and the electrode is a uniformly charged flat surface. The capacitance of this model fluid is calculated with the SRISM approach with closures based on the hypernetted chain (HNC) and Kovalenko-Hirata (KH) closures and compared with simulations. As long as the magnitude of the electrode charge is not too great, the HNC closure shows the most promise. The KH results are reasonably good for a high density electrolyte but are poor when applied at low densities.

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