TFEC (Bis(2,2,2-trifluoroethyl) Carbonate, 99.5%) as Battery Electrolyte Additive, 25 g/bottle, CBEATFEC
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TFEC (Bis(2,2,2-trifluoroethyl) carbonate) is a highly effective and essential electrolyte additive, particularly for stabilizing high-capacity anodes like silicon (Si) and lithium metal (Li), which undergo massive volume changes during cycling. The main role of TFEC is to facilitate the formation of a robust, flexible, and ion-conducting Solid Electrolyte Interphase (SEI) on the anode surface, especially for materials that suffer from severe volume changes (e.g., Silicon expands up to ~300% upon lithiation).
| Part Number |
CBEATFEC (C-BEA-TFEC) |
| CAS |
1513-87-7 |
| Chemical Formula |
C5H4F6O3  |
| Appearance |
Colorless Liquid |
| Purity |
99.5% (Battery Grade) |
| Molecular Weight | 226.07 g/mol |
| Boiling Point | ~118 °C (lit.) |
| Package Size | 25 g/bottle |
Notes: Please store the TFEC solution in the glovebox due to its sensitivity to humidity and oxygen
References:
- D. Ouyang, et al. An all-fluorinated electrolyte with 1,1,2,2-tetrafluoroethyl-2,2,3,3-tetrafluoropropylether as co-solvent for lithium-ion cells with advanced electrochemical and safety properties at high voltage, J. Power Source, 2024, 615, 235095.
- M. Binder, et al. Ternary electrolyte additive mixture for 5V lithium-ion battery cells, J. Power Sources, 2025, 630, 236073.