TFHP (Tris(2,2-difluoroethyl) Phosphate, TDFP or TDFEP, >99.0%) as Battery Electrolyte Co-Solvent and Additive, 10-50 g/bottle, CBESATFHP

Tris(2,2-difluoroethyl) phosphate (frequently designated as TFHP or TDFEP) is a specialized fluorinated organophosphate compound engineered as a high-performance flame retardant, co-solvent, and functional interphase-directing additive for advanced lithium-ion and sodium-ion batteries. By introducing partially fluorinated ethyl ester groups around a central phosphate core, it achieves a balance between intrinsic safety enhancement and fluidic compatibility with standard battery formulations.

Its main functional roles in electrolyte engineering are: (1) Intrinsic Flame Retardancy & Radical Scavenging: Due to its combined phosphorus and fluorine content, TFHP acts as an effective flame retardant in both the condensed and vapor phases. It quenches active combustion radicals during thermal abuse, sharply reducing the heat release rate and mitigating thermal runaway risks. (2) Interphase (SEI/CEI) Passivation: TFHP undergoes preferential electrochemical reduction at the anode and oxidation at the high-voltage cathode during early cycle life. This multi-facial passivation builds a robust, hybrid inorganic-organic protective film rich in metal fluorides (LiF / NaF) and phosphate decomposition species that suppress continuous electrolyte consumption. (3) Optimized Viscosity & Wetting Profile: Compared to bulky, fully perfluorinated tertiary alkyl phosphates (such as TFEP/HFiPP), the simpler 2,2-difluoroethyl architecture maintains a more moderate viscosity and lower steric hindrance, supporting rapid separator wetting and ionic transport.

Its main electrochemical applications are: (1) High-Voltage Lithium-Ion Systems: Integrated into high-energy master electrolytes paired with high-nickel layered oxides (e.g., NMC811) to suppress transition-metal dissolution and maintain structural integrity above 4.3 V. (2) Safer Commercial and Large-Format Cells: Deployed in energy storage systems (ESS) and electric vehicle (EV) cells requiring strict compliance with thermal abuse, overcharge resistance, and nail-penetration safety standards.

Part Number	CBESATFHP (C-BESA-TFHP)
CAS	358-64-5
Chemical Formula	C6H9O4P1F6
Appearance	Colorless Liquid
Purity	>99.0% (Battery Grade)
Molecular Weight	290.1 g/mol
Package Size	10 g, 25 g, and 50 g/bottle

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

References: 

1. P. Murmann, et al. Influence of the Fluorination Degree of Organophosphates on Flammability and Electrochemical Performance in Lithium Ion Batteries: Studies on Fluorinated Compounds Deriving from Triethyl Phosphate,  J. Electrochem. Soc., 2016, 163, A751
2. N. Kaekratoke, et al. Phosphated cyclic carbonates as flame retardant additives for lithium batteries, Journal of Power Sources, 2026, 673, 239658.