TFEMA {2,2,2-Trifluoroethyl methacrylate, or TFMA, >99.0%} as Fluorinated Monomer for Gel Polymer Electrolyte, 50-200 g/bottle, CGPEFMTFEMA

2,2,2-Trifluoroethyl methacrylate (TFMA) is a short-chain fluorinated methacrylate monomer (CF3CH2OCOC(CH3=CH2) widely utilized in advanced Gel Polymer Electrolytes (GPEs) and in situ polymerized battery systems. Unlike long perfluoroalkyl tail monomers like TFOA, TFMA offers a compact fluorinated ester group that strikes an optimal balance between high-voltage oxidative stability, low viscosity, and excellent compatibility with standard carbonate liquid electrolytes.

Its main structural and functional features are: (1) Chemical Structure: A methacrylic backbone featuring a pendant 2,2,2-trifluoroethyl ester group. The shorter CF3 moiety lowers steric hindrance compared to long-chain fluorinated acrylics, promoting faster and more uniform polymerization kinetics. (2) Thermal & Electrochemical Stability: The electron-withdrawing CF3 group significantly raises the LUMO/HOMO energy levels, widening the electrochemical window (> 4.7 V vs. Li/Li+) and suppressing oxidative degradation at high charge potentials. (3) Solubility & Miscibility: Highly miscible with standard battery aprotic solvents (EC, PC, DMC, EMC, DEC) and lithium salts (LiPF6, LiTFSI, LiFSI), making it ideal for formulating homogeneous in situ gel precursor solutions.

The core advantages of TFMA as monomer for GPEs are: (1) Enhanced Ionic Conductivity & Low Viscosity: Because of its compact molecular footprint and lower molecular weight than long-chain fluorinated monomers, TFMA-based polymer networks maintain higher segmental mobility and superior liquid electrolyte retention. This prevents excessive viscosity build-up and ensures high room-temperature ionic conductivity (> 10^{-3} S/cm when gelled with standard organic liquid electrolytes). (2) Robust In Situ Thermal/UV Polymerization: TFMA readily undergoes radical polymerization via thermal initiators (such as AIBN or BPO) or UV light (with photoinitiators like Irgacure 2959 or TPO). In in situ cell assembly, the liquid precursor infiltrates the porous separator and electrode pores before curing into a dimensionally stable gel network that eliminates interfacial resistance. (3) Inorganic-Rich SEI / CEI Formation (LiF Generation): During initial electrochemical formation cycles, the trifluoroethyl groups reductively decompose at the lithium metal or high-voltage cathode interface, contributing to a compact, stable, and fluorine-rich passivation layer (featuring robust LiF nanocrystals). This suppresses lithium dendrite penetration and mitigates transition-metal dissolution.

Part Number	CGPEFMTFEMA (C-GPE-FM-TFEMA)
CAS	352-87-4
Chemical Formula	H2C=C(CH3)CO2CH2CF3
Molecular Weight	168.11 g/mol
Density	1.181 g/mL at 25 °C (lit.)
Boling Point	59 °C/100 mmHg (lit.)
Storage Temperature	2-8°C
Package Size	50 g, 100 g, and 200 g/bottle

Notes: Please try to store the TFEMA monomer in a dry and low temperature (2-8°C) place. 

References: 

1. M. Li, et al. Balancing Solvation Ability of Polymer and Solvent in Gel Polymer Electrolytes for Efficient Lithium Metal Batteries, Angew Chem Int Ed., 2025, 64, e202513450
2. H. Li, et al. In situ construction of 3D crossing-linked gel polymer electrolyte toward high performance and safety lithium metal batteries, Journal of Power Sources, 2024, 618, 235189