DMTFA (N,N-Dimethyltrifluoroacetamide, >99.5%) as Battery Electrolyte Co-Solvent and Additive, 10-50 g/bottle, CBESADMTFA

N,N-Dimethyltrifluoroacetamide (commonly designated as DMTFA) is a specialized fluorinated amide compound engineered for advanced energy storage systems. By pairing a strongly electron-withdrawing trifluoromethyl group with a polar dimethylamide backbone, DMTFA functions as a high-permittivity co-solvent, solvation-sheath modifier, and functional interphase-directing additive for high-voltage lithium-ion, lithium-metal, and sodium-ion batteries.

Its main functional roles in electrolyte engineering are: (1) Solvation Sheath Engineering: DMTFA actively participates in the primary solvation shell of lithium or sodium ions. Because of its strong donor number coupled with the electron-withdrawing inductive effect of the -CF3 group, it facilitates anion incorporation into the inner solvation sheath, encouraging anion-derived interphase formation. (2) Robust Interphase (SEI/CEI) Passivation: During initial electrochemical reduction and oxidation, DMTFA decomposes to help construct a hybrid, inorganic-organic protective film. This interphase is enriched with metal fluorides (LiF / NaF) alongside nitrogen-containing decomposition species, which collectively suppress continuous electrolyte consumption and dendrite growth. (3) High-Voltage Oxidative Stability: The electron-withdrawing fluorinated tail deactivates the amide nitrogen and carbonyl oxygen against premature electrophilic attack, raising the anodic stability threshold to support high-voltage cathode operation (>4.3 V).

Its main electrochemical applications are: (1) High-Voltage Lithium-Ion Systems: Integrated into master formulations paired with high-nickel layered oxides (e.g., NMC811) to minimize transition-metal dissolution and reduce gassing during high-temperature cycling. (2) Lithium-Metal and Sodium-Metal Anodes: Assists in stabilizing highly reactive alkali metal surfaces by establishing a dense, uniform, and ionically conductive passivation layer.

Part Number	CBESADMTFA (C-BESA-DMTFA)
CAS	1547-87-1
Chemical Formula	C4H6F3NO
Appearance	Colorless Liquid
Purity	>99.5% (Battery Grade)
Molecular Weight	141.09 g/mol
Package Size	10 g, 25 g, and 50 g/bottle

Notes: Please store the DMTFA in the glovebox due to its sensitivity to humidity and oxygen. 

References: 

1. E. Yoo, et al. Enhanced Cycle Stability of Rechargeable Li–O2 Batteries by the Synergy Effect of a LiF Protective Layer on the Li and DMTFA Additive, ACS Appl. Mater. Interfaces (2017) 9 (25): 21307–21313.
2. V. S. Bryantsev, et al. Investigation of Fluorinated Amides for Solid–Electrolyte Interphase Stabilization in Li–O2 Batteries Using Amide-Based Electrolytes, 
   J. Phys. Chem. C (2013) 117 (23): 11977–11988.