Potassium Bis(trifluoromethanesulfonyl)imide(KTFSI),Battery Grade 500g

Potassium Bis(trifluoromethanesulfonyl)imide (KTFSI), Battery Grade 500g

Chemical Name: Potassium Bis(trifluoromethanesulfonyl)imide
CAS Number: 90076-67-8
Product Code: EL90076-67-8
Grade: Battery Grade
Brand: Xnergy

Product Introduction

Potassium bis(trifluoromethanesulfonyl)imide (KTFSI) is the potassium-ion analog of LiTFSI and NaTFSI, combining the TFSI⁻ anion’s exceptional thermal stability with K⁺ as the charge carrier. KTFSI is primarily used in research contexts where thermal stability, moisture tolerance, and ionic liquid compatibility are priorities over room-temperature conductivity. The TFSI⁻ anion’s large size and charge delocalization promote complete K⁺ dissociation in polymer and ionic liquid matrices, making KTFSI a useful salt for K-ion solid polymer electrolytes and K-metal ionic liquid battery studies. As with LiTFSI and NaTFSI, KTFSI corrodes aluminum current collectors at elevated potentials and is best used in non-Al cell configurations. Xnergy supplies battery-grade KTFSI for potassium-ion research applications.

Key Features

• Exceptional thermal stability — TFSI⁻ stable above 300°C; no HF generation; highly moisture-tolerant
• Ionic liquid compatible — ideal for K-ion ionic liquid electrolyte systems requiring high thermal stability
• Polymer electrolyte compatible — supports K⁺ conduction in PEO-based and other K-ion solid polymer electrolyte matrices
• High K⁺ dissociation — charge-delocalized TFSI⁻ promotes complete salt dissolution in low-polarity environments
• Purity ≥99% / H₂O ≤10 ppm / Acid ≤10 ppm — battery-grade quality for K-ion advanced electrolyte research
• Flexible volumes — available from 500 g for laboratory research

Specification

Application Areas

• K-ion ionic liquid electrolyte formulation (KTFSI in Py₁₄TFSI or EMIMTFSI)
• PEO/KTFSI solid polymer electrolyte for K-ion all-solid-state battery research
• High-temperature K-ion electrolyte studies requiring thermal stability above 100°C
• Fundamental K⁺ transport and solvation studies in non-Al cell formats
• Comparative alkali-metal TFSI salt study (LiTFSI / NaTFSI / KTFSI) in polymer or ionic liquid systems
• K-metal battery electrolyte research in ether or ionic liquid solvents

Related Products

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• Lithium Bis(trifluoromethanesulfonyl)imide (LiTFSI), Battery Grade
• Browse the full Salts category.