DFEA (2,2-Difluoroethyl Acetate, 99.9%) as Battery Electrolyte Additive, 100 g/bottle, CBEADFEA
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DFEA (2,2-Difluoroethyl Acetate) is a fluorine-containing ester used primarily as a co-solvent or diluent in electrolytes for high-voltage, high-energy-density lithium-ion batteries (LIBs). The main purpose of DFEA is to support high-voltage cycling since the two fluorine atoms on the ethyl group increase the oxidative stability of the solvent molecule. DFEA is often used as a co-solvent with cyclic carbonates like Ethylene Carbonate (EC) to lower down the flammability and improve battery safety.
| Part Number |
CBEADFEA (C-BEA-DFEA) |
| CAS |
1550-44-3 |
| Chemical Formula |
C4H6F2O2  |
| Appearance |
Colorless Liquid |
| Purity |
99.9% (Battery Grade) Free Acid<15 ppm, H20 level < 20 ppm |
| Molecular Weight | 124.08 g/mol |
| Boiling Point | ~106 °C (lit.) |
| Package Size | 100 g/bottle |
Notes: Please store the DFEA powder in the glovebox.
References:
- Z. Chang, et al. Design and Mechanism Study of High-Safety and Long-Life Electrolyte for High-Energy-Density Lithium-Ion Batteries, ACS Appl. Mater. Interfaces 2024, 16, 15, 18980–18990.
- Y. Gao, et al. Low-Temperature and Fast-Charging Sodium Metal Batteries Enabled by Molecular Structure Regulation of Fluorinated Solvents, Adv. Funct. Mater., 2025, 35, 2414652.