Low temperature electrolytes for lithium-ion batteries
Specifications:
| 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. |
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:
|
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
Characteristics
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.
