Abstract
Ionic liquids are designable and fine-tunable in terms of their properites, which allows them to be task-specific. This paper focuses on electrochemical devices using ionic liquid electrolytes, which exhibit wide liquid temperature ranges, negligible vapor pressure and high ionic conductivity. Here, we review the relationship between physicochemical and structural properties of ionic liquids. Based on the unique physicochemical properties, we also introduce the novel electrochemical devices such as polymer actuators, lithium secondary batteries and nonhumidified intermediate temperature fuel cells.
