<p>Ionic liquids (ILs) are unique materials made of cations and anions that have seen a resurgence in recent decades owing to their wide applicability. The utility of ILs in the field of high-energy molecules and energetic materials has been widely studied. These compounds have an enormous reservoir of chemical energy that can be liberated under specified conditions. With increased environmental and safety concerns, much effort has been put into developing ecologically friendly, high-energy molecules. ILs have shown the potential to be one of them. This article covers ILs based on imidazole, triazole, and tetrazole molecules as well as their synthesis, properties as high-energy molecules, and applications.</p>