ECA {Ethyl 2-cyanoacrylate} as Monomer for Gel Polymer Electrolyte, 100 g/bottle, CGPEMECA

Ethyl 2-cyanoacrylate (ECA)—the primary active monomer in commercial super glue—as a host for gel polymer electrolytes (GPEs) is a clever design strategy. It takes an incredibly cheap, mass-market chemical and turns it into a high-performance, high-voltage matrix. By taking advantage of the same rapid bonding behavior that makes it an instant adhesive, ECA enables initiator-free or low-energy in-situ polymerization inside the cell. Furthermore, its heavily polarized chemical structure yields exceptional electrochemical properties.

The ECA monomer (CH2=C(CN)COOCH2CH3) features two intense, electron-withdrawing groups—a cyano (nitrile) group and an ester (─COO─) group—co-bonded to a single unsaturated carbon atom. Because these twin groups aggressively pull electron density away from the C=C double bond, the monomer is highly electrophilic. It undergoes incredibly rapid, spontaneous anionic polymerization at room temperature when exposed to the briefest trace of nucleophiles, weak bases, or metal surfaces (like a lithium or sodium anode). This can remove the absolute requirement for harsh UV exposure or high-temperature thermal ovens during cell processing.

When successfully polymerized into poly(ethyl cyanoacrylate) (PECA), the resulting matrix offers substantial advantages over conventional PVDF-HFP or PEO systems: (1) Super-Dielectric Screening: The vast concentration of highly polar cyano and ester side chains creates an environment with an elevated dielectric constant. This provides intensive electrostatic shielding that rapidly dissociates lithium or sodium salt aggregates (like LiTFSI or LiClO4). By breaking down ion pairs into free mobile ions, PECA-based GPEs regularly achieve exceptional room-temperature ionic conductivities peaking above 2.5 times 10^{-3} S/cm}. (2) Deep Anodic Stability (>4.8 V): Nitrile-containing frameworks are legendary for their high-voltage resilience. The strong electron-withdrawing nature of the functional groups lowers the energy level of the polymer's Highest Occupied Molecular Orbital (HOMO). This prevents oxidative decomposition at the cathode interface, providing an expansive electrochemical stability window reaching up to 4.8 V vs. Li/Li+. This makes ECA GPEs uniquely suited for ultra-high-voltage cells paired with demanding cathodes like high-voltage LiCoO2 or ultra-high nickel NCM layers.  

Part Number	CGPEMECA (C-GPE-M-ECA)
CAS	7085-85-0
Chemical Formula	C6H7NO2
Molecular Weight	125.13 g/mol
Package Size	100 g/bottle

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

References: 

1. X, Li, et al. A dual-functional gel-polymer electrolyte for lithium ion batteries with superior rate and safety performances, J. Mater. Chem. A (2017) 5 (35): 18888–18895
2. C. Fu, et al. Regulating Micro-phase Structure in Plastic Crystal Gel Polymer Electrolyte for Quasi-Solid-State Lithium Metal Batteries, Adv. Funct. Mater., 2024, 34, 2312187