PEGDA {Poly(ethylene glycol) diacrylate} as Solid-State Battery Electrolyte, CSSBEPEGDA

PEGDA (Poly(ethylene glycol) diacrylate) is a foundational building block for crosslinked solid-state polymer electrolytes. While standard linear PEO suffers from high room-temperature crystallinity (which locks down ion transport) and poor mechanical stiffness when melted, PEGDA completely alters this landscape. By featuring reactive acrylate groups (-C(=O)CH=CH2) at both ends of a flexible polyether chain, PEGDA can be cured (via thermal initiators like AIBN or UV photo-initiators) to form a robust, three-dimensional crosslinked polymer network.

The crosslinking density and behavior of a PEGDA network are highly sensitive to the molecular weight (Mn) of the underlying PEG segment (typically ranging from Mn = 200 to 2000 g/mol). (1) Suppression of Crystallinity: The covalent crosslinks (the acrylate "junction points") act as structural anchors that mechanically prevent the long polyether chains from aligning into rigid crystalline domains. This keeps the matrix completely amorphous at room temperature, unlocking continuous ion-conducting pathways. (2) Segmental Motion vs. Elastic Mesh: Cations (Li+ or Na+) coordinate with the ethereal oxygens (-C-O-C-) along the PEG loops. Ion transport is driven by the local flipping and twisting of these chains (segmental motion). (3) The Mn Trade-Off: Low Mn (e.g., 200–400): Tightly packed crosslinks, exceptional mechanical shear modulus (great for stopping dendrites), but highly restricted chain mobility, leading to lower ionic conductivity. High Mn (e.g., 1000–2000): Long, loose polyether loops with high segmental mobility (excellent conductivity), but a softer, gel-like mechanical structure.

Part Number	CSSBEPEGDA (C-SSBE-PEGDA)
CAS	26570-48-9
Chemical Formula	(C3H3O)(C2H4O)n(C3H3O2)
Average Molecular Weight	(1) Mw = 1000, liquid form, 100 mL/bottle (2) Mw= 2000, solid powder form, 5 g/bottle (3) Mw= 5000, solid powder form, 5 g/bottle (4) Mw= 10000, solid powder form, 5 g/bottle

Notes: Please try to store the PEGDA in a dry place (glovebox is preferred). 

References: 

1. F. S. Genier, et al. A novel calcium-ion solid polymer electrolyte based on crosslinked poly(ethylene glycol) diacrylate, J. Power Sources, 2019, 414, 302-307
2. M. S Grewal, et al. Effect of the Poly(ethylene glycol) Diacrylate (PEGDA) Molecular Weight on Ionic Conductivities in Solvent-Free Photo-Cross-Linked Solid Polymer Electrolytes, Langmuir 2023, 39, 29, 10209–10215