High temperature electrolytes for lithium-ion batteries
Specifications:
| Electrolyte salt | Lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) ( Plus appropriate co-salts depending on the application. |
| Solvent | Carbonate-based solvents i.e. EC, PC, DOL, DME Solvent type and composition is discussable upon application. |
| Example composition |
1 M LiTFSI dissolved in EC:PC (1:1, v:v)issolved 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 |
Drums per:
|
7 drums per pallet 12 drums per pallet 12 drums per pallet |
2 drums per pallet 3 drums per pallet 4 drums 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). |
LiTFSI as conducting salt in electrolytes for high temperature applications
Characteristics
Lithium bis(trifluoromethanesulfonyl)imide (LiTFSI, LiC2F6NO4S2) is a promising alternative to the most used lithium salt, LiPF6, due to its advanced thermal and chemical stability, including a reduced sensitivity towards hydrolysis.
However, the inability of LiTFSI to form a protective layer on the aluminum current collector leading to the anodic dissolution of aluminum at high potentials (> 3.5 V vs. Li+/Li), limits its use as single salt, without LiPF6 or fluorinated solvents.
Application fields
LiTFSI is highly soluble in water and organic solvents. This enables its use in either water-in-salt electrolytes for aqueous lithium-ion batteries or highly concentrated electrolytes. When used as an additive for high-voltage applications (> 4.5 V vs. Li+/Li), it can enhance the long-term cycling stability > 500 cycles.
