Mean-Field Theory of Electrical Double Layer In Ionic Liquids with Account of Short-Range Correlations
Mean-Field Theory of Electrical Double Layer In Ionic Liquids with Account of Short-Range Correlations
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DOI：
10.1016/j.electacta.2016.12.092
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发表时间：
2017-01-20
影响因子：
6.6
通讯作者：
Kornyshev, Alexei A.
中科院分区：
文献类型：
--
作者：
Goodwin, Zachary A. H.;Feng, Guang;Kornyshev, Alexei A.
我们发展了Kornyshev（2007）早期提出的离子液体中的双电层理论。在自由能函数中，我们保留了所谓的短程相关项，这些项在那里被省略了。通过一些简化的假设，我们得到了微分电容的修正表达式，这使得微分电容曲线对电极电位的依赖性不那么明显，并且在极值处的值比以前的理论要小。这使得结果更接近典型的实验观察，并使其吸引力使用这种形式主义的实验数据的处理。德拜长度和离子配对的程度在离子液体的影响，然后简要讨论。(C)2016爱思唯尔有限公司版权所有。
We develop the theory of the electrical double layer in ionic liquids as proposed earlier by Kornyshev (2007). In the free energy function we keep the so called short-range correlation terms which were omitted there. With some simplifying assumptions, we arrive at a modified expression for differential capacitance, which makes differential capacitance curves less sharply depending on electrode potential and having smaller values at extrema than in the previous theory. This brings the results closer to typical experimental observations, and makes it appealing to use this formalism for treatment of experimental data. Implications on Debye length and the extent of ion paring in ionic liquids are then briefly discussed. (C) 2016 Elsevier Ltd. All right reserved.