Bis(trifluoromethylsulfonyl)imide, CAS: 82113-65-3

Key Applications:

• • Reduced fuming and safer handling compared to anhydrous HTFSI.
  • Improved metering accuracy for neutralization reactions.
  • Lower volatility and easier integration into continuous‑flow or batch salt‑production systems.
  • Compatible with industrial‑scale purification and crystallization workflows for downstream TFSI⁻ salts.

    Electrolyte Manufacturing and Salt Precursor Processing

    • Used as a controlled‑strength precursor for generating TFSI⁻ salts through neutralization with lithium, sodium, potassium, ammonium, phosphonium, or imidazolium bases.
    • Aqueous format enables safer handling and more uniform stoichiometric control during salt formation, minimizing thermal load and avoiding direct handling of anhydrous HTFSI.
    • Supports scalable production of battery‑grade salts, ionic liquids, and deep eutectic electrolytes.

    Polymer and Membrane Functionalization

    • Acts as a sulfonylating and ion‑exchange reagent for preparing TFSI‑functionalized polymers, ionomers, and proton‑conducting membranes.
    • Aqueous medium improves compatibility with hydrophilic polymer backbones and reduces the need for aggressive organic solvents.

    Catalysis and Acid‑Mediated Transformations

    • Serves as a strong Brønsted acid for aqueous or biphasic catalytic systems requiring high acidity without introducing halides.
    • Enables acid‑catalyzed esterifications, rearrangements, and dehydration reactions where non‑nucleophilic counterions are essential.

    Surface Treatment and Materials Processing

    • Used to introduce TFSI⁻ into inorganic and hybrid materials through ion‑exchange or protonation pathways.
    • Supports preparation of TFSI‑doped metal oxides, conductive coatings, and surface‑modified nanoparticles.

    Electrochemical and Analytical Applications

    • Provides a controlled route to generate TFSI‑based electrolytes for supercapacitors, redox‑flow systems, and specialty electrochemical cells.
    • Aqueous form simplifies pH adjustment and ion‑exchange workflows in analytical chemistry and materials screening.

    Advantages of the Aqueous 70–72% Format

    • Reduced fuming and safer handling compared to anhydrous HTFSI.
    • Improved metering accuracy for neutralization reactions.
    • Lower volatility and easier integration into continuous‑flow or batch salt‑production systems.
    • Compatible with industrial‑scale purification and crystallization workflows for downstream TFSI⁻ salts.

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