Potassium bis(trifluoromethanesulfonyl)imide, CAS: 90076-67-8

Key Applications:

Electrolytes for High‑Performance Batteries

• Used as a potassium‑ion conducting salt in next‑generation K‑ion battery electrolytes.
• Supports high oxidative stability and wide electrochemical windows in carbonate, ether, and ionic‑liquid solvent systems.
• Enables improved cycling stability and reduced interfacial resistance in graphite, hard‑carbon, and Prussian blue analog cathode systems.

Supercapacitors and Hybrid Capacitors

• Serves as a high‑conductivity supporting salt in organic and ionic‑liquid electrolytes for potassium‑based supercapacitors.
• Enhances ionic mobility and thermal stability, enabling high‑temperature or high‑voltage operation.

Ionic Liquid and Deep Eutectic Solvent Formulations

• Functions as an anion source for synthesizing potassium‑based ionic liquids with low viscosity and high ionic conductivity.
• Used in tailoring solvent polarity, electrochemical stability, and metal‑ion coordination behavior.

Electrodeposition and Metal Processing

• Applied in specialized metal‑ion coordination systems for controlled electrodeposition of potassium or mixed‑alkali metals.
• Utilized in molten‑salt and high‑temperature electrochemical environments where TFSI⁻ stability is advantageous.

Catalysis and Organometallic Chemistry

• Acts as a non‑coordinating counterion in catalytic systems requiring weakly coordinating anions.
• Supports stabilization of reactive cationic intermediates in homogeneous catalysis and polymerization chemistry.

Analytical and Spectroscopic Applications

• Used as a reference salt or ion‑pairing reagent in electrochemical studies and conductivity measurements.
• Employed in NMR and spectroscopic investigations where minimal anion–metal interaction is required.

Materials Science and Polymer Electrolytes

• Incorporated into polymer matrices (PEO, PVDF, PMMA) to create potassium‑conducting solid or gel electrolytes.
• Enhances mechanical stability and ionic transport in flexible or solid‑state energy‑storage materials.

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