HFBA {2,2,3,4,4,4-Hexafluorobutyl acrylate} as Monomer for Gel Polymer Electrolytes (GPEs), 100 g/bottle, CGPEMHFBA

2,2,3,4,4,4-Hexafluorobutyl acrylate (HFBA) is a specialized fluorinated acrylate monomer heavily researched for in situ polymerized gel polymer electrolytes (GPEs) in advanced high-energy-density batteries. Compared to unfluorinated acrylates (like methyl or ethyl acrylate) or standard ether-based matrices (like PEO or PEGDA), HFBA alters the polymer solvation structure and interfacial chemistry, making it ideal for high-voltage cathodes (such as ultra-high nickel NCM811 or NCM9451) and lithium/sodium metal anodes.

The molecular structure of HFBA features a polymerizable acrylate head group attached to a heavily fluorinated tail: CH2=CH--COO-CH2-CF2-CH(CF3). The densely packed fluorine atoms (-CF2-) and (-CF3-) groups introduce specific characteristics to the gel matrix: The fluorine atoms pull electron density away from the acrylate backbone, drastically raising the monomer's oxidation potential and preventing premature degradation at high operational voltages. Fluorinated segments reduce the overall surface energy of the gel polymer, promoting uniform wetting on polyolefin separators and lithium metal surfaces.

The Fluorine-Oxygen Co-Coordination Effect: In a typical unfluorinated polyacrylate or PEO matrix, metal cations (Li+ or Na+) coordinate strongly with the carbonyl (C=O) or ether (C-O-C) oxygens. This tight binding means the ions can only move when the polymer chains physically relax, limiting ionic conductivity. Poly(HFBA) alters this via a unique fluorine-oxygen co-coordination structure. The weak, localized interactions from the neighboring fluorine atoms balance out the oxygen coordination, allowing the metal ions to readily decouple from the polymer chain. This accelerates ion hopping independent of polymer segment relaxation, boosting the cation transference number. 

In Situ Formation of an Inorganic-Rich SEI/CEI: During the initial electrochemical cycles, the fluorinated side-chains (-CF2-CF-CF3-) are highly sensitive to preferential decomposition at the electrode surfaces before the bulk organic liquid solvents can break down: Anode (SEI): It decomposes to form a dense, uniform, and highly elastic Lithium Fluoride (LiF) or Sodium Fluoride (NaF)-rich inorganic solid electrolyte interphase. This high-surface-energy inorganic layer effectively blocks electron tunnel effect, regulates ion flux, and suppresses dendrite growth. Cathode (CEI): On aggressive, high-nickel cathodes (like NCM811 or NCM9451), it forms a highly stable Cathode Electrolyte Interphase (CEI) that mitigates transitional metal dissolution and oxygen evolution at cut-off voltages exceeding 4.5 V.

Part Number	CGPEMHFBA (C-GPE-M-HFBA)
CAS	54052-90-3
Chemical Formula	H2C=CHCO2CH2CF2CH(F)CF3
Purity	>98%
Molecular Weight	236.11 g/mol
Density	1.389 g/mL at 25 °C (lit.)
Package Size	100 g/bottle (liquid)

Notes: Please try to store the HFBA monomer in a dry place. 

References: 

1. J. Park, et al. Design of Fluorinated Elastomeric Electrolyte for Solid-State Lithium Metal Batteries Operating at Low Temperature and High Voltage, Adv. Mater., 2024, 36, 2403191
2. X. Dong, et al. Tailoring Solvation Structure via Soft-Hard Segment Synergy in Gel Polymer Electrolytes Enables Dendrite-Free Sodium Batteries with Ultra-Long Cycling, Adv. Mater., 2026, 38, e73323