1-Ethyl-3-vinylimidazolium bis(trifluoromethylsulfonyl)imide, CAS: 204854-22-8

Key Applications:

Advanced Polymer and Membrane Engineering

• Serves as a vinyl‑functional ionic liquid monomer for free‑radical, RAFT, and UV‑initiated polymerizations.
• Enables synthesis of poly(ionic liquid)s (PILs) with high ionic conductivity and tunable mechanical properties.
• Used in ion‑exchange membranes, solid polymer electrolytes, and gas‑separation films where TFSI⁻ enhances mobility and electrochemical stability.

Electrochemical Devices and Energy Storage

• Incorporated into lithium‑ion, sodium‑ion, and multivalent battery electrolytes to improve thermal stability and suppress dendrite formation.
• Supports quasi‑solid and gel polymer electrolytes when copolymerized with acrylates, methacrylates, or vinyl ethers.
• Applied in supercapacitor separators and ionic‑conductive binders for high‑performance electrodes.

Functional Coatings and Surface Modification

• Polymerizable vinyl group enables formation of crosslinked ionic networks for antistatic, anti‑fouling, and ion‑transport coatings.
• Used in surface‑grafted ionic brushes to tune wettability, adhesion, and charge transport.
• Supports fabrication of stimuli‑responsive films (thermal, electrochemical, or solvent‑triggered).

Gas Capture, Separation, and Catalysis

• Forms PIL matrices with high CO₂ affinity and adjustable permeability/selectivity.
• Used in supported ionic‑liquid membranes (SILMs) for CO₂/N₂ and CO₂/CH₄ separations.
• Provides a stable ionic environment for heterogeneous catalysis, including polymer‑supported catalysts and ion‑exchange resins.

Additive for Composites and Advanced Materials

• Enhances ionic transport in nanocomposites containing silica, graphene, or metal–organic frameworks.
• Improves dispersion of conductive fillers in printed electronics and ion‑conductive inks.
• Used in 3D‑printable resin systems where ionic functionality improves curing behavior and mechanical performance.

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