离子液体是液体中的盐。在某些情况下，该术语仅限于熔点低于某一任意温度的盐，如100°C(212°F)。普通液体如水和汽油主要由电中性分子组成，而离子液体主要由离子和短寿命的离子对组成。这些物质被称为液体电解质、离子熔体、离子液体、熔盐、液体盐或离子玻璃。它们被称为“未来的溶剂”和“设计溶剂”。离子液体被描述为具有许多潜在的应用。它们是强大的溶剂和导电流体（电解质）。在近环境温度下为液体的盐对电池应用很重要，并且由于其极低的蒸汽压力而被认为是密封剂。
1-butylsulfonic-3-methylimidazolium hydrogensulfate
3-Ethyl-1-methyl-1H-imidazol-3-ium bromide
1-Ethyl-1-methylpyrrolidin-1-ium bromide
1-Butyl-3-methyl-1H-imidazol-3-ium hexafluorostibate(V)
1-Decyl-3-methylimidazolium tetrafluoroborate
1-ethyl-3-methylimidazolium diethylphosphate
1,2-Dimethyl-3-propyl-1H-imidazol-3-ium iodide
3-Butyl-1-methyl-1H-imidazol-3-ium tetrafluoroborate
1-Hexyl-3-methyl-1H-imidazol-3-ium hexafluorophosphate(V)
Tetraethylammonium iodide
3-Butyl-1-methyl-1H-imidazol-3-ium hydroxide
N,N,N-Trimethyl-1-phenylmethanaminium chloride
N,N,N-Trimethylhexadecan-1-aminium bromide
Methyltributylphosphoniumiodide
3-Butyl-1-methyl-1H-imidazol-3-ium hydrogensulfate
1-Butyl-3-methylpyridin-1-ium bromide
N-Methyl-N,N-dioctyloctan-1-aminium chloride
N-hexadecyltrimethylammoniumtetrafluoroborate
1-Benzyl-3-methyl-1H-imidazol-3-ium chloride
1-Benzyl-3-methyl-1H-imidazol-3-ium 4-methylbenzenesulfonate
1,3-Dimethyl-1H-imidazol-3-ium iodide
N-Butyl-N-methylpyrrolidinium bis((trifluoromethyl)sulfonyl)imide
1-Butyl-3-methylpyridinium Chloride
1-Butyl-2,3-dimethyl-3-imidazolium chloride
1-Butyl-2,3-dimethyl-1H-imidazol-3-ium hexafluorophosphate(V)
1-Butyl-2,3-dimethylimidazolium Tetrafluoroborate
1-Butyl-3-methylimidazolium tosylate
1-Butyl-3-methylpyridin-1-ium bis((trifluoromethyl)sulfonyl)amide
N-butylpyridinium bromide
1-Butylpyridinium Chloride
