1,2-Dimethyl-3-propylimidazolium bis(trifluoromethylsulfonyl)imide, 99%

1,2-Dimethyl-3-propylimidazolium bis(trifluoromethylsulfonyl)imide (169051-76-7) ; Lithium Ion Batteries

1,2-Dimethyl-3-propylimidazolium bis(trifluoromethylsulfonyl)imide (DMPIIm) is a fluorinated, hydrophobic ionic liquid with the molecular formula C10H15F6N3O4S2 and the molecular weight 419.36 g/mol2. It has a CAS number of 169051-76-7 and a PubChem Compound ID of 117504743. It is a liquid at room temperature and a density of 1.436 g/mL at 25 °C24. It has a glass transition temperature of -82 °C and a decomposition temperature greater than 250 °C. It has a viscosity of 107 mPa * s at 25 °C. It has a heat capacity of 554 J/(mol * K) at 25 °C and a conductivity of 1.95 mS/cm at 25 °C. It has an electrochemical stability window of 4.6 V, an anodic limit of 2.4 V and a cathodic limit of -2.2 V. DMPIIm is not miscible in water, acetonitrile, isopropanol, or hexane, but it is miscible with acetone and toluene.

Key Applications

1,2-Dimethyl-3-propylimidazolium bis(trifluoromethylsulfonyl)imide (DMPIIm) has applications in energy storage, especially as an electrolyte for lithium batteries. It has a high ionic conductivity of 2.5 mS cm−1 at 25 °C and a wide electrochemical window. It also shows good interfacial stability with lithium metal and can prevent the formation of dendrites. These properties make it a promising candidate for high-performance lithium metal batteries that can offer higher energy density and longer cycle life than conventional lithium-ion batteries.

DMPIIm can also be used as a solvent or catalyst in chemical processes due to its non-volatile and thermally stable nature3. For example, it can be used as a solvent for the synthesis of silver nanoparticles by microwave irradiation. It can also be used as a catalyst for the Friedel–Crafts alkylation of benzene with alkyl halides. Moreover, it can be used as a medium for the extraction of aromatic compounds from hydrocarbon mixtures.

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