1-Ethyl-2,3-dimethylimidazolium bis(trifluoromethylsulfonyl)imide, CAS: 174899-90-2

Key Applications:

1. Electrochemical Systems

• Lithium‑ion and sodium‑ion electrolytes
  • High oxidative stability supports high‑voltage cathodes.
  • Hydrophobic TFSI⁻ anion improves SEI formation and reduces parasitic reactions.
• Supercapacitors and hybrid capacitors
  • Low viscosity relative to bulkier imidazoliums improves ion mobility.
  • Wide electrochemical window enables higher energy density.
• Electrodeposition media
  • Stable under reductive conditions; supports smooth metal deposition (Al, Mg, rare‑earths).

2. Synthetic Chemistry & Catalysis

• Non‑nucleophilic reaction medium
  • Excellent for strong electrophiles, Lewis acids, and moisture‑sensitive transformations.
• Organometallic catalysis
  • Supports homogeneous catalysts requiring inert, non‑coordinating environments.
• High‑temperature synthesis
  • Thermal stability of the TFSI⁻ anion allows reactions above 200 °C without decomposition.

3. Thermal & Process Engineering

• Heat‑transfer and thermal‑storage fluids
  • High thermal stability and low vapor pressure make it suitable for closed‑loop systems.
• Solvent for high‑temperature separations
  • Useful in extractive distillation and purification of aromatics or specialty organics.

4. Materials Science & Surface Engineering

• Polymer electrolytes and ion gels
  • Enhances ionic conductivity while maintaining mechanical stability.
• Surface modification & lubrication
  • Hydrophobic, low‑volatility IL for boundary lubrication in metal–metal contacts.
• Nanomaterial dispersion
  • Stabilizes conductive nanomaterials (CNTs, graphene) due to π‑cation interactions.

5. Gas Capture & Separation

• SO₂, HF, and acidic gas absorption
  • TFSI⁻ anion provides high chemical resistance; cation structure tunes solubility.
• Fluorinated gas separations
  • Strong affinity for fluorinated species due to the perfluorinated anion.

6. Safety‑Critical & Harsh‑Environment Applications

• Non‑flammable electrolyte or solvent
  • Suitable for aerospace, defense, and high‑temperature industrial systems.
• Radiation‑resistant media
  • Imidazolium–TFSI systems show resilience under ionizing radiation, useful in nuclear‑adjacent environments.

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