Electrolyt LiFSI

LiFSI based electrolyte for lithium-ion batteries

Electrolyte salt: Lithium bis(fluorosulfonyl)imide (LiFSI) (and 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 size: 25 g – 20 kg (larger amounts available upon request )

Packaging :

  • Our electrolytes come in UN-certified aluminum transport bottles (made in Germany), which are wrapped in pouch bags sealed under an inert gas atmosphere
  • Pouch bags are shipped in UN-approved cardboard boxes suitable for the transportation of dangerous goods (in compliance with ADR).

Delivery time: maximum 14 days within EU


If you are further interested in our tailor-made LiFSI-based electrolyte solutions, please feel free to contact us at contact@e-lyte-innovations.de or by using our contact form:


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Characteristics of 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 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

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.