Interface structures, molten layer

While in aqueous solutions an electrical double layer is formed, in molten salts an electrical multilayer is formed because of their structure [116]. The Russian school, particularly Dogonadze and Chizmadzhev [117], presented the first theoretical description of this layer. These authors used a binary distribution function to interpret X-ray diffraction measurements in molten salts. By means of these results they tried to describe the structure of the melt at the interface and concluded that the charge distribution was characterized by an attenuated oscillation of the charge distribution in the melt. 

As Schmickler states [3], Electrochemistiy is the study of structures and processes at the interface between an electronic conductor (the electrode) and an ionic conductor (the electrolyte) or at the interface between two electrolytes . The electrode/electrolyte or electrolyte/electrolyte interface is the region whose properties differ from the two adjoining phases, and/or the place where reactant adsorption and electrochemical reactions occur. Commonly, it is recognized as the interface between an electronic conductor (e.g., metals and semiconductors) and an ionic conductor (e.g., electrolyte solutions, molten salts, and solid electrolytes), known as an electrochemical interface. In a narrow region of an electrode/electrolyte interface, an electrical double layer (EDL) exists. The EDL is believed to be extremely thin, and is an important component of the interface. 

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