期刊
LANGMUIR
卷 34, 期 40, 页码 11971-11985出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.langmuir.8b02064
关键词
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资金
- Andlinger Center for Energy and the Environment at Princeton University
- National Science Foundation [CBET - 1702693]
We study the effects of asymmetry in electrolyte valence (i.e., non z:z electrolytes) on mean field theory of the electrical double layer. Specifically, we study the effect of valence asymmetry on finite ion-size effects, the dielectric decrement, and ion ion correlations. For a model configuration of an electrolyte near a charged surface in equilibrium, we present comprehensive analytical and numerical results for the potential distribution, electrode charge density, capacitance, and dimensionless salt uptake. We emphasize that the asymmetry in electrolyte valence significantly influences the diffuse-charge relations, and prior results reported in the literature are readily extended to non z:z electrolytes. We develop scaling relations and invoke physical arguments to examine the importance of asymmetry in electrolyte valence on the aforementioned effects. We conclude by providing implications of our findings on diffuse-charge dynamics and other electrokinetic phenomena.
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