Double layer in ionic liquids: The nature of the camel shape of capacitance

被引：255
|
作者：
Fedorov, M. V. [1 ]
Georgi, N. [1 ]
Kornyshev, A. A. [2 ]
机构：
[1] Max Planck Inst Math Sci, D-04103 Leipzig, Germany
[2] Univ London Imperial Coll Sci Technol & Med, Dept Chem, London SW7 2AZ, England
来源：
ELECTROCHEMISTRY COMMUNICATIONS | 2010年 / 12卷 / 02期
基金：
英国工程与自然科学研究理事会;
关键词：
Ionic liquids; Electrical double layer; Capacitance; Molecular simulations; ELECTRICAL DOUBLE-LAYER; DIFFERENTIAL CAPACITANCE; TEMPERATURE; ELECTROCHEMISTRY;
D O I：
10.1016/j.elecom.2009.12.019
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
Monte Carlo simulations of a model ionic liquid show that if ions have charged heads and neutral counterparts, the latter give rise to the camel shape of the voltage dependence of the double layer capacitance. Neutral 'tails' of ions play the role of latent voids that can be replaced by charged groups via rotations and translations of ions. This provides extra degrees of freedom for the field-induced charge rearrangements in the double layer which results in the peculiar double-hump capacitance profile. (C) 2009 Elsevier B.V. All rights reserved.
引用
收藏
页码：296 / 299
页数：4
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