TFEB (Tris(2,2,2-trifluoroethyl)borate, TTFEB, >99.0%) as Battery Electrolyte Additive, 10-25 g/bottle, CBEATTFB

TFEB (Tris(2,2,2-trifluoroethyl) borate, frequently abbreviated as TTFEB, B(OCH2CF3)3) is an advanced organoborate compound engineered as a functional electrolyte additive for high-performance lithium-ion and lithium-metal batteries. By pairing a central electron-deficient boron atom with heavily fluorinated alkoxy groups, TFEB provides targeted interfacial stabilization, particularly under high-voltage and elevated-temperature conditions.   

The key functional roles of TFEB as battery electrolyte additive are shown below: (1) Cathode Electrolyte Interphase (CEI) Formation: TFEB preferentially undergoes electrochemical oxidation on high-potential cathode surfaces before bulk carbonate solvents decompose. This yields a stable, protective passivating film that prevents direct contact between the active material and the liquid electrolyte, suppressing transition-metal dissolution (e.g., manganese or cobalt leaching). (2) Lewis Acid / Anion Receptor Behavior: The central boron atom functions as a Lewis acid and effective anion receptor. It coordinates with degradation byproducts (such as fluoride ions or trace nucleophiles generated from LiPF6 hydrolysis), mitigating destructive side reactions. (3) Impurities and HF Scavenging: By chemically trapping trace moisture and acidic species like hydrofluoric acid (HF), TFEB protects the current collectors and prevents acid-catalyzed destruction of the active cathode structure. (4) Anode Interphase Enhancement: The fluorinated ethyl groups assist in contributing inorganic fluoride components (such as LiF) to the Solid Electrolyte Interphase (SEI) on graphite or lithium-metal anodes, promoting more uniform ion flux and suppressing dendritic growth.

Part Number	CBEATTFB (C-BEA-TTTFB)
CAS	659-18-7
Chemical Formula	C6H6BF9O3
Appearance	Colorless Liquid
Purity	>99.0%
Molecular Weight	307.91 g/mol
Package Size	10 g and 25 g/bottle

Notes: Please try to store the TFEB liquid in a dry place (glovebox or dryroom is preferred)

References: 

1. Z. Xie, et al. Designing High-Temperature Stable Electrolytes: Insights from the Degradation Mechanisms of Boron-Containing Additives, Journal American Chemical Society (2025) 147 (27): 23931–23945.
2. O. B. Chae, et al. Lithium Cyano Tris(2,2,2-trifluoroethyl) Borate as a Multifunctional Electrolyte Additive for High-Performance Lithium Metal Batteries, ACS Energy Lett. (2021) 6 (11): 3851–3857.