## 1 Introduction  
Typical applications of propellant include fuel-like functions such as driving turbines, moving pistons, pumping fluids, starting aircraft engines, _etc._[1]. For military applications, propellants are employed for firing bullets, missiles, and rockets, as well as ejecting pilots [2]. More commonly used high explosives such as RDX (1,3,5-trinitroperhydro-1,3,5-triazine) [3] or TNT (2,4,6-trinitrotoluene) [3] are inappropriate for rocket propellant due to poor performance, high sensitivities, high production costs, and detrimental decomposition gases [4; 5; 6]. Hydrazine and its methylated derivatives have become more and more important in the world of both war and peacetime propellants [7; 8; 9]. Furthermore, hydrazine (H\({}_{2}\)N-NH\({}_{2}\)) and methylated hydrazines have been widely used as hypergolic biroppellants in combination with oxidizers such as LOX (liquid oxygen), RFNA (red fuming nitric acid), or N\({}_{2}\)O\({}_{4}\) (NTO = nitrogen tetroxide) [10; 11; 12; 13]. In order to prevent an unwanted collection of fuel and oxidizer, it is important for the reactions to progress as rapidly as possible (minimal ignition delay time). In previous studies, 50 ms was the target for the maximum acceptable time for ignition delay; now the target may be as low as a few milliseconds depending on the application [14]. The phenomenon of spontaneous ignition after the reaction between the fuel and oxidizer is called Hypergol. After the first report of a hypergolic ionic liquid (IL) in 2008 [15], researchers have focused on synthesizing hypergolic ILs with low melting points, wide liquid ranges, high thermal stabilities, and short ignition-delay (ID) times [16; 17; 18; 19; 20; 21; 22; 23]. Furthermore, hypergolic ILs could serve as biroppellant fuels over a variety of conditions due to the high thermal and chemical stabilities, low volatilities, and long liquid ranges [2; 15]. A new family of dicyanoborates ILs has been synthesized in water with substituted nacyclic, N-cyclic, and azolium cations to meet the desired criteria required for well-performing fuels [2; 15]. There is a great need for alternate oxidizers and hypergolic fuels that will have low toxicity, high density, long-term storability, and excellent performance. The extremely carcinogenic nature of hydrazine as well as its volatility presents difficulties for its handling [1; 2; 4]. Finding a way to replace hydrazine is one of the main goals of researchers in this field. The conversion of hydrazine and its derivatives into energetic ionic liquids (EILs) can be an alternative path of investigation for the replacement of hydrazine. [PERSON] and [PERSON] [7] used \(N\),\(N\)-dimethyl hydrazine dihydrochloride to synthesize a family of new hydrazinium salts, but these salts failed to detonate when exposed to a Bunsen burner flame. Salt-based energetic materials have lower vapor pressures and higher densities than neutral compounds [4]. Furthermore, salt-based energetic materials have lower sensitivities and higher thermal and chemical stabilities than commonly used high explosives. Salts based on fewer oxidizing anions were found to be more resistant to impact and friction, showing no signs of decomposition at the maximum loading for friction tests (FS \(>\) 360 N) [2]. For hypergolic EILs to successfully replace hydrazine they must possess shorter ignition delay (ID) times than the conditions leading to their own detonation. In the review article of [PERSON] and her co-authors [2], they summarized the developing trends in the field of new energetic materials with emphasis on propulsion applications. [PERSON] _et al._[15] developed new green hypergolic biroppellants that contain hydrogen peroxide and hydrogen-rich ionic liquids. They claimed that this class of ILs has the potential for providing non-cryogenic, high-performing, green biropulsion for the first time.