MPC (Methyl Prop-2-yn-1-yl Carbonate, >98.0%) as Battery Electrolyte Additive, 5-25 g/bottle, CBEAMPC

Methyl Prop-2-yn-1-yl Carbonate—commonly known as Methyl Propargyl Carbonate (MPC)—is an unsaturated asymmetrical linear carbonate used as a film-forming functional additive in non-aqueous electrolytes for lithium-ion, lithium-metal, and sodium-ion batteries.

Sacrificial Anodic Reduction & Flexible Poly-Alkyne SEI: The electron-deficient alkyne triple bond (C≡C) reduces at higher potentials (~ 1.3 V to 1.6 V vs. Li/Li+) than standard linear or cyclic carbonates (e.g., EC, DMC). Sacrificial reduction triggers radical polymerization of the propargyl group, generating an organic-rich, elastic poly-alkyne/carbonate network within the Solid Electrolyte Interphase (SEI) on graphite, silicon-carbon, or lithium-metal anodes.

Suppression of Gas Generation and Impedance Growth: Unlike vinylene carbonate (VC), which can generate significant CO2 gas during high-temperature formation and storage, MPC’s propargyl-derived polymeric SEI forms with minimal gas evolution. The resulting SEI is thin and highly ionic-conductive, reducing initial impedance growth and polarization during high-rate cycling.

Cathode Electrolyte Interphase (CEI) Passivation: At high operational potentials (> 4.3 V vs. Li/Li+), MPC can also undergo oxidative polymerization at active cathode sites. This forms a protective CEI layer on nickel-rich cathodes (NMC811, NCMA) and high-voltage LCO, suppressing transition-metal leaching (Ni^{3+}/Ni^{4+},Mn^{3+) and preventing electrolyte oxidation.

Dendrite Mitigation on Alkali-Metal Anodes: The uniform poly-alkyne interphase layer homogenizes Li+ (or Na+) ion flux across the electrode surface, preventing localized electric-field concentration and suppressing dendritic growth in lithium-metal or sodium-metal cells.

Part Number	CBEAMPC (C-BEA-MPC)
CAS	61764-71-4
Chemical Formula	C5H6O3
Appearance	Colorless Liquid
Purity	>98.0%
Molecular Weight	114.10 g/mol
Package Size	5 g, 10 g, and 25 g/bottle

Notes: Please store the MPC powder in a dry place.

References: 

1. Z. Chang, et al. Design and Mechanism Study of High-Safety and Long-Life Electrolyte for High-Energy-Density Lithium-Ion Batteries, ACS Appl. Mater. Interfaces 2024, 16, 15, 18980–18990.
2. Y. Gao, et al. Low-Temperature and Fast-Charging Sodium Metal Batteries Enabled by Molecular Structure Regulation of Fluorinated Solvents, Adv. Funct. Mater., 2025, 35, 2414652.