标题： 介观理论在浓离子系统中的双层电容 显示英文标题

标题： Mesoscopic theory for a double layer capacitance in concentrated ionic systems

摘要： 在介观理论框架下，研究了集中离子溶液和离子液体中电荷密度的振荡衰减对双电层电容的影响。 仅考虑所有离子体系中存在的库仑力和立体排斥力。 我们表明，电荷振荡会导致电极与赫尔姆霍兹电容中反离子虚拟单层之间的重新缩放距离，缩放因子取决于电荷振荡的周期。 我们为高离子密度和小电压情况下的简单公式可以作为集中离子溶液和离子液体中双电层电容的参考点，并有助于分离特定系统中电容的普遍和特异性贡献。 显示英文摘要

摘要： Effect of an oscillatory decay of the charge density in concentrated ionic solutions and ionic liquids on the double-layer capacitance is studied in a framework of a mesoscopic theory. Only Coulomb and steric forces between the ions that are present in all ionic systems are taken into account. We show that the charge oscillations lead to a rescaled distance between the electrode and the virtual monolayer of counterions in the Helmholtz capacitance, and the scaling factor depends on the period of the charge oscillations. Our very simple formula for large density of ions and small voltage can serve as a reference point for the double layer capacitance in concentrated ionic solutions and ionic liquids, and can help to disentangle the universal and specific contributions to the capacitance in particular systems.