Electrolyt LiFSI

Low temperature electrolytes for lithium-ion batteries



Electrolyte salt Lithium bis(fluorosulfonyl)imide (LiFSI)
Plus appropriate co-salts depending on the application.
Solvent Carbonate-based solvents, i.e. EC, DEC, DMC, EMC
Solvent type and composition is discussable upon application.
Example composition
0.8 M LiPF6 + 0.2 M LiFSI dissolved in EC:EMC (3:7, w:w)
Batch sizes manufactory
25 mL – 2.0 L bottles
Batch sizes production site  20 L – 200 L barrels
Delivery time maximum 14 days within EU
Delivery times outside the EU on request.
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    Packaging of our Electrolytes

    20 L barrel 200 L barrel
    Diameter [mm] <=320 <=600
    Height [mm] <=530 <=1150
    Net weight [kg] ~8,5 ~50
    Material (AISI) 304 / 316L stainless steel 304 / 316L stainless steel
    Quick couplings Nitto Kohki 1P for inert gas
    Nitto Kohki 2P for product
    Alternative couplings on request
    Nitto Kohki 2P for inert gas
    Nitto Kohki 4P for product
    Alternative couplings on request
    Barrels per:

    • EU pallet  (120 x 80 cm)
    • Container pallet (114 x 114 cm)
    • Industrial Drum pallet (120 x 120 cm)
    7 barrels per pallet
    12 barrels per pallet
    12 barrels per pallet
    2 barrels per pallet
    3 barrels per pallet
    4 barrels per pallet
    Bottle (25 mL – 2.5 L) Our electrolytes come in UN-certified aluminum bottles (made in Germany), which are wrapped in pouch bags sealed under an inert gas atmosphere.
    Pouch bags Shipped in UN-approved cardboard boxes suitable for the transportation of dangerous goods (in compliance with ADR).

    Lithium bis(fluorosulfonyl)imide (LiFSI) as conducting salt for Li-ion battery electrolytes


    Lithium bis(fluorosulfonyl)imide (LiFSI, LiN(SO2F)2) is used as either as co-salt or additive in Li-ion battery electrolytes. The salt has an increased thermal stability (up to 200 °C) compared to LiPF6 and high ionic conductivity due to its medium-range anion size and a higher degree of dissociation leading to a higher mobility of the ions. High purity LiFSI-based electrolytes eliminate the problem of aluminum current collector corrosion up to 5.0 V vs. Li+/Li.

    Application fields of Lithium bis(fluorosulfonyl)imide (LiFSI)

    The main advantage of LiFSI is its remarkable low-temperature performance, even below -20 C. When used as an additive, it aids in the formation of a uniform and stable secondary-electrolyte-interphase (SEI) on the negative electrode that can restrain the further decomposition of carbonate-based solvents and LiPF6 salt on the electrode.