Room-Temperature Ionic Liquids: Excluded Volume and Ion Polarizability Effects in the Electrical Double-Layer Structure and Capacitance

被引：89
作者：
Lauw, Y. [1 ,2 ]
Horne, M. D. [1 ]
Rodopoulos, T. [1 ]
Leermakers, F. A. M. [3 ]
机构：
[1] CSIRO Minerals, Clayton, Vic 3169, Australia
[2] ANSTO, Bragg Inst, Menai, NSW 2234, Australia
[3] Univ Wageningen & Res Ctr, Lab Phys Chem & Colloid Sci, NL-6700 HB Wageningen, Netherlands
来源：
PHYSICAL REVIEW LETTERS | 2009年 / 103卷 / 11期
关键词：
INTERFACE; GOLD; MIXTURES; SURFACE; WATER; MODEL;
D O I：
10.1103/PhysRevLett.103.117801
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We study structures of room-temperature ionic liquids at electrified interfaces and the corresponding electrical double-layer capacities using a self-consistent mean-field theory. Ionic liquids are modeled as segmented dendrimers and the effective dielectric constant is calculated from the local distribution of ions to accommodate the excluded volume and the local dielectric screening effects. The resulting camel-shaped capacitance curve is further analyzed in terms of the thickness of alternating layers and the polarization of ions at electrified interfaces.
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页数：4
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