Electrical double-layer capacitance in room temperature ionic liquids: ion-size and specific adsorption effects
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Date
2010-09-02
Journal Title
Journal ISSN
Volume Title
Publisher
American Chemical Society
Abstract
The electrical double-layer structure and capacitance in room temperature ionic liquids at electrified interfaces were systematically studied with use of the self-consistent mean-field theory. The capacitance curve departs from symmetry with respect to the point of zero charge when unequal ion-size is implemented or when specific adsorption of ions is introduced. For the case of unequal ion-size, the shape of the capacitance curve is strongly determined by the size of the counterion and only weakly influenced by the co-ion size. When present, specifically adsorbed ions would change the capacitance within a limited range of applied potential from the point of zero charge, which itself varies with the strength of specific adsorption. © 2010, American Chemical Society
Description
Keywords
Capacitance, Adsorption, Electrical properties, Liquids, Charge states, Ions
Citation
Lauw, Y.,Horne, M. D., Rodopoulos, T., Nelson, A., & Leermakers, F. A. M. (2010). Electrical double-layer capacitance in room temperature ionic liquids: ion-size and specific adsorption effects. Journal of Physical Chemistry B, 114(34), 11149–11154. doi:10.1021/jp105317e