Imidazolium salts are a versatile class of compounds that are frequently used to prepare ionic liquids due to their stable cationic structure. These salts exhibit excellent chemical and thermal stability, allowing them to be used in harsh conditions without decomposing. Imidazolium-based ionic liquids have applications in electrochemistry, where they are used as electrolytes in batteries and supercapacitors. They are also used as solvents for reactions involving metals and organic compounds due to their ability to dissolve a wide range of substances. In addition, imidazolium ionic liquids are explored for gas separation and capture due to their tunable physical properties.