PETA {Pentaerythritol triacrylate, >99.0%} as Crosslinking Monomer for Gel Polymer Electrolyte, 50-200 g/bottle, CGPECMPETA

Pentaerythritol triacrylate (PETA, >99.0%) is a multi-functional acrylic monomer heavily utilized as a high-performance crosslinking agent in advanced Gel Polymer Electrolytes (GPEs) and in situ solidified battery systems. Because of its trifunctional molecular architecture, PETA rapidly forms a dense, highly interconnected 3D polymer network that immobilizes liquid electrolytes, completely eliminates liquid leakage, and dramatically enhances the mechanical and thermal stability of high-energy lithium and sodium battery systems.

Its main structural and functional features are: (1) Chemical Structure: Features a central pentaerythritol core branching into three reactive acrylate (CH2=CHCOO-) groups. (2) High Functionality (f = 3): Unlike linear or bifunctional monomers (such as PEGDA or standard mono-acrylates), PETA’s tri-functionality allows it to act as an immediate branching and node-forming network builder, achieving rapid gelation and tight mesh-size control. (3) Solubility & Reactivity: Highly soluble in standard aprotic battery solvents (EC, PC, DEC, DMC, EMC) and readily polymerizes via free-radical mechanisms using thermal initiators (e.g., AIBN, BPO) or photo-initiators (e.g., HMPP, Irgacure). (4) Thermal & Dimensional Resilience: Forms a tightly crosslinked matrix that resists thermal creep, prevents local softening at elevated cell temperatures, and safely restrains lithium dendrite growth.

The core advantages of PETA as monomer for GPEs are: (1) Rapid 3D Network Formation & Liquid Immobilization: Upon thermal or UV activation inside the cell stack, PETA molecules quickly crosslink into a dense, sponge-like polymer skeleton that traps and immobilizes organic liquid electrolytes. This transforms a free-flowing liquid cell into a dimensionally stable, quasi-solid-state system without sacrificing ionic pathways. (2) Suppression of Polysulfide Shuttling & Parasitic Side Reactions: In sulfur-based or high-voltage chemistries, the dense network architecture created by PETA restricts the diffusion path of large intermediate species (such as polysulfides in Li-S systems), while protecting the electrolyte from continuous catalytic decomposition at aggressive electrode surfaces. (3) Enhanced Mechanical Interfacial Contact: In situ polymerization using PETA starts from a low-viscosity liquid precursor that thoroughly wets micro-pores in separators (e.g., glass fiber or PP/PE) and porous electrode structures. Once cured, it eliminates interfacial resistance gaps, maintaining intimate contact during volume fluctuations associated with charge-discharge cycling.

Part Number	CGPECMPETA (C-GPE-CM-PETA)
CAS	3524-68-3
Chemical Formula	(H₂C=CHCO₂CH₂)₃CCH₂OH
Molecular Weight	298.3 g/mol
Density	1.152–1.172 g/mL at 25 °C (lit.)
Viscosity	350–700 cP at 25°C
Glass Transition Temperature (Tg)	103°C
Package Size	50 g, 100 g, and 200 g/bottle

Notes: Please try to store the PETA monomer in a dry and low temperature (4°C) place. 

References: 

1. S. Murugan, et al. Stable Cycling of Room-Temperature Sodium-Sulfur Batteries Based on an In Situ Crosslinked Gel Polymer Electrolyte, Adv. Funct. Mater., 2022, 32, 2201191
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