Asymmetric size of ions and orientational ordering of water dipoles in electric double layer model - an analytical mean-field approach

作者：Gongadze Ekaterina; Iglic Ales^*

来源：Electrochimica Acta, 2015, 178: 541-545.

DOI：10.1016/j.electacta.2015.07.179

• Electric double layer
• Relative permittivity
• Different ions size
• Finite volumes
• Water dipoles

Electric double layer is theoretically described within the mean-field approach by taking into account the orientational ordering of water dipoles and asymmetric size of cations and anions. Analytical expressions for the spatial distribution of ions and water dipoles are derived. The effect of asymmetric ionic size on accumulation of counterions and partial depletion of water molecules near the charged surface, on spatial dependence of relative permittivity and on differential capacitance of electric double layer are presented.

• 出版日期2015-10-1