NaFSI, a light yellow or colorless transparent liquid, is an electrolyte additive made of 30% W sodium difluorosulfonyl imide. It is available in solvent systems such as DEC, EMC, and PC. NaFSI has the advantages of good electrochemical stability, excellent low-temperature performance, and high conductivity, and can be used as an electrolyte additive for sodium ion batteries. By optimizing the electrolyte solvent structure, promoting the formation of solid electrolyte interface (SEI), and inhibiting the growth of sodium dendrites and reducing interface side reactions, the cycle life and safety performance of the battery can be significantly improved.
characteristic:
Enhance battery safety: suppress sodium dendrite growth, improve battery cycle life and thermal runaway;
Excellent electrochemical performance: improves ion conductivity, reduces electrolyte impedance, and enhances sodium ion migration efficiency; The dense and stable SEI film formed reduces irreversible capacity loss and improves initial Coulombic efficiency.
Wide temperature range adaptability: maintains high efficiency performance within the range of -40 ° C to 60 ° C, suitable for battery design in extreme environments.
Excellent antioxidant properties: suitable for high voltage (≥ 4.0 V vs. Na/Na ⁺) sodium ion battery systems.
Environmental friendliness: insensitive to water and less toxic compared to traditional fluorine-containing additives.
This product can be used as an electrolyte additive or independent electrolyte for sodium ion batteries, applied to sodium metal batteries (SMBs), sodium ion batteries (layered oxides, polyanions, Prussian blue positive electrode systems, and especially polyanion positive electrodes and hard carbon systems); It can also be used as an antistatic agent and catalyst for polymerization reactions in the industrial field.
Sodium difluorosulfonylimide
Molecular formula: F2NO4S2. Na
CAS： 100669-96-3
Molecular weight: 203.12
Melting point: 109-114 º C
Solvent (EMC): DEC, ECM, PC
CL content: ≤ 3ppm
Concentration: 30% ± 1%
Appearance: Colorless and transparent liquid
Moisture content: ≤ 30ppm
Chromaticity: ≤ 30HaZen
Hydrofluoric acid content: ≤ 10ppm
Density: 1.184 ± 0.008g/cm3
Calcium content: ≤ 4ppm
Iron content: ≤ 4ppm
Lead content: ≤ 1ppm
Potassium content: ≤ 20ppm
Chromium content: ≤ 1ppm
Lithium content: ≤ 4ppm
Turbidity: ≤ 10NTU
