BTFO (Bis(2,2,2-trifluoroethyl) oxalate, 99.0%) as Battery Electrolyte Additive, 10 g/bottle, CBEABTFO
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BTFO (Bis(2,2,2-trifluoroethyl) oxalate) is a specialized, highly fluorinated chemical that is used as an electrolyte additive in advanced lithium-ion batteries (LIBs). The function of BTFO is similar to other oxalate and fluorinated compounds: it acts as a film-forming additive to stabilize the electrode-electrolyte interfaces, particularly under challenging conditions like high voltage and high temperature. The C2O4 (oxalate) group, upon reduction, contributes to the formation of stable organic lithium salts (like Li2C2O4) in the Solid Electrolyte Interphase (SEI). The F atoms from the trifluoroethyl groups (CH2CF3) are released during decomposition and lead to the incorporation of Lithium Fluoride (LiF) into the SEI and the Cathode Electrolyte Interphase (CEI). LiF-rich interphases are highly valued for their mechanical robustness and chemical stability.
| Part Number |
CBEABTFO (C-BEA-BTFO) |
| CAS |
466684-90-2 |
| Chemical Formula |
C6H4F6O4  |
| Appearance |
Colorless Liquid |
| Purity |
99.0% |
| Molecular Weight | 254.09 g/mol |
| Density | 1.518 g/cm3 |
| Melting Point | ~62-63 °C (lit.) |
| Package Size | 10 g/bottle |
Notes: Please store the BTFO liquid in the glovebox with low temperature (<15 °C).