In my talk I will consider the interplay between two competing interactions characteristic of electrolyte solutions: 1) short range repulsions that arise from packing constraints, and 2) long-ranged attractions that arise from the oppositely charged species. I will discuss how each are modulated by composition and extended interfaces. The theory that describes this interplay and its consequences for electrochemical response has some simple universal features which are illustrated with molecular simulations. These competing interactions also confer a complex dissociation dynamics onto ion pairs, which can result in charactoristic timescales in heterogenious environment that are very different than their bulk counterparts. These kinetics, and how they are modulated at an interface, are studied using extensions of rare event sampling techniques.

Charge density correlations in electrolyte solutions and their impact in electrochemical properties and dynamics

2019 Spring National Meeting

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