TMC {Trimethylene Carbonate, or 1,3-Dioxan-2-one, >99.0%} as Monomer for Gel Polymer Electrolyte, 5-25 g/bottle, CGPEMTMC

Trimethylene Carbonate (TMC)—systematically named 1,3-dioxan-2-one—is a six-membered cyclic carbonate ester. While traditional liquid electrolytes rely on five-membered cyclic carbonates like ethylene carbonate (EC) or propylene carbonate (PC), TMC is primarily used as a functional monomer for synthesizing poly(trimethylene carbonate) (PTMC) solid and gel polymer electrolytes, as well as a specialty co-solvent or precursor in high-safety lithium and post-lithium battery chemistries.

Polymer Matrix for All-Solid-State & Gel Electrolytes (PTMC): Via Ring-Opening Polymerization (ROP), TMC easily forms poly(trimethylene carbonate) (PTMC), an amorphous, flexible aliphatic polycarbonate matrix. Unlike Poly(ethylene oxide) (PEO), which readily crystallizes at room temperature, PTMC exhibits a low glass transition temperature (Tg ~-15°C to -26°C), delivering high segmental mobility and enhanced ambient ionic conductivity without requiring high operating temperatures.

High Anodic Oxidation Stability (>4.5 V vs. Li/Li+): Carbonate ester linkages (-O-COO-) in the polymer backbone or liquid state possess lower HOMO energy levels compared to ether-based polymer matrices (like PEO). This wide electrochemical window enables PTMC-based solid-state electrolytes to operate alongside high-voltage cathodes like NMC811, LCO, and LNMO without severe oxidative degradation.

In Situ Polymerization for Seamless Interphase Contact: TMC monomer can be infiltrated into porous electrodes alongside lithium salts (LiTFSI, LiFSI) and polymerized in situ (thermally or catalytically) inside the cell. This eliminates high interfacial resistance commonly observed between solid polymer electrolytes and rigid electrode active materials.

Suppression of Lithium Dendrite Growth: Cross-linked or copolymerized PTMC networks exhibit strong mechanical toughness and uniform Li+ flux distribution, suppressing lithium dendrite initiation and improving safety in lithium-metal batteries.

Part Number	CGPEMTMC (C-GPE-M-TMC)
CAS	2453-03-4
Chemical Formula	C4H6O3
Purity	>99.0%
Molecular Weight	102.09 g/mol
Package Size	5 g, 10 g, and 25 g/bottle

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

References: 

1. M. M. Silva, et al. Novel solid polymer electrolytes based on poly(trimethylene carbonate) and lithium hexafluoroantimonate, Solid State Sciences, 2006, 8, 1318-1321
2. H. Tomimatsu, et al. Poly(trimethylene carbonate)-Based Ternary Electrolytes Containing an Organic Ionic Plastic Crystal for Solid-State Lithium Batteries, ACS Appl. Polym. Mater. (2026) 8 (14): 11536–11546.