936057

Potassium bis(trifluoromethylsulfonyl)imide

≥99.5% trace metals basis, anhydrous, battery grade

• Synonym(s): Potassium trifluoromethanesulfonimide, KTFSI, Potassium bis(trifluoromethanesulfonyl)imide
• Empirical Formula (Hill Notation): C₂F₆KNO₄S₂
• CAS Number: 90076-67-8
• Molecular Weight: 319.24
• MDL number: MFCD06200829
• UNSPSC Code: 12352104

Properties

• grade: battery grade
• Quality Level: 100
• Assay: ≥99.5% trace metals basis
• form: powder
• greener alternative product characteristics: Design for Energy Efficiency; Learn more about the Principles of Green Chemistry.
• sustainability: Greener Alternative Product
• impurities: ≤5,000 ppm (trace metals analysis)
• mp: 198-203 °C
• application(s): battery manufacturing
• greener alternative category: Enabling
• SMILES string: [K+].FC(F)(F)S(=O)(=O)[N-]S(=O)(=O)C(F)(F)F
• InChI: 1S/C2F6NO4S2.K/c3-1(4,5)14(10,11)9-15(12,13)2(6,7)8;/q-1;+1
• InChI key: KVFIZLDWRFTUEM-UHFFFAOYSA-N

Description

General description

Potasium bis(trifluoromethanesulfonyl)imide, abbreviated KTFSI, is a white, crystalline salt. It is hygroscopic and sensitive to air. KTFSI is soluble in water, carbonates (including dimethyl carbonate, diethyl carbonate, and propylene carbonate), glymes and other ethers (such as dimethoxyethane and dioxolane), ionic liquids such as N-butyl-N-methyl bis(trifluoromethanesulfonyl) imide, and many of the solvents commonly used in battery electrolytes.

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Application

KTFSI is used as an electrolytic salt in potassium-ion batteries because of its high solubility in various polar organic solvents, its high ionic conductivity, and its high oxidative stability up to 4 V vs K+/K. Because KTFSI-based electrolytes are sensitive to impurities and trace moisture, our KTFSI is designed for superior purity with less than 250 ppm water. KTFSI is compatible with a wide range of electrodes including metallic potassium anodes, layered tellurates like K₂NiTeO₆ or K₂MgTeO₆, potassium sulfides, and even organic cathodes. Researchers have also used KTFSI in dual-graphite batteries in which the K+ ions intercalate into graphite anodes to form KC₈ and the TFSI- anions intercalate into graphite cathodes. In addition to being studied for intercalation-type electrodes, KTFSI has served as a stable electrolyte in conversion-type battery chemistries, for example with antimony anodes.

Safety Information

• Pictograms: GHS05
• Signal Word: Danger
• Hazard Statements: H314
• Precautionary Statements: P260 - P280 - P303 + P361 + P353 - P304 + P340 + P310 - P305 + P351 + P338 - P363
• Hazard Classifications: Eye Dam. 1 - Skin Corr. 1B
• Storage Class Code: 8A - Combustible corrosive hazardous materials
• WGK: WGK 3
• Flash Point(F): Not applicable
• Flash Point(C): Not applicable