Choline bis(trifluoromethylsulfonyl)imide, CAS: 827027-25-8

Key Applications:

Electrolytes for Energy Storage

• Serves as a high‑stability ionic liquid electrolyte component in lithium‑ion, sodium‑ion, and emerging multivalent battery systems.
• Enhances ionic conductivity and electrochemical window in solid–liquid hybrid electrolytes.
• Used in polymer gel electrolytes and ionogel matrices for flexible and solid‑state devices.

Electrochemical Devices & Interfaces

• Employed in supercapacitor electrolytes to improve thermal stability and long‑term cycling performance.
• Supports electrode surface engineering, including controlled SEI formation and interfacial ion transport studies.
• Utilized in redox‑active systems for flow batteries and electrocatalytic platforms.

Catalysis & Green Chemistry

• Functions as a thermally robust, non‑volatile reaction medium for acid‑ and base‑catalyzed transformations.
• Applied in transition‑metal catalysis, including cross‑coupling, hydrogenation, and CO₂ conversion reactions.
• Enables biphasic catalysis and catalyst recycling due to its immiscibility with many organic solvents.

Separation Science & Extraction

• Used in liquid–liquid extraction of metal ions, particularly rare‑earth and transition‑metal species, due to strong TFSI⁻ coordination.
• Supports selective extraction of hydrophobic organics and fluorinated compounds.
• Applied in membrane‑based separations and supported ionic liquid phases (SILPs).

Materials Science & Polymer Engineering

• Incorporated into polymer matrices to tune conductivity, mechanical flexibility, and thermal behavior.
• Used in ionogels, block copolymers, and advanced dielectric materials.
• Serves as a plasticizer or ionic dopant in conductive polymers and elastomers.

Surface & Colloid Science

• Acts as a surfactant‑like ionic liquid for stabilizing dispersions of nanoparticles, carbon materials, and metal oxides.
• Supports controlled self‑assembly and nanostructure formation in soft materials.

Analytical & Spectroscopic Applications

• Provides a low‑volatility, high‑purity medium for NMR, FTIR, and electrochemical characterization.
• Used in fundamental studies of ion pairing, solvation, and transport phenomena.

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