Vinyl chlorocarbonate

Electrolytes are generally prepared from high-purity organic solvents, lithium electrolytes, and socially necessary functional food additives under certain economic conditions and in a certain time ratio. The development of cost management institutions for various raw materials is roughly as follows: among them, organic chemical solvents are the main component of electrolytes. Currently, the commonly used organic reaction solvents in the Chinese market mainly include Chinese chloroethylene carbonate manufacturers, ethylene carbonate (EC), diethyl carbonate (DEC), dimethyl carbonate (DMC), and methyl ethyl carbonate (EMC); In terms of electrolyte lithium salts, most enterprises currently focus on lithium hexafluorophosphate (LiPF6).

In general, organic solvents and electrolyte lithium salts in electrolytes are easy to analyze and imitate, but it is usually difficult for us to determine the main components of the additive chlorinated vinyl carbonate through analysis results. Therefore, teachers can say that the additive composition is the core issue of electrolyte and enterprise technological development, which is to improve system safety (flame retardant additives, overcharge environmental protection additives), circulation (film-forming additives) The key lies in the ratio (conductive additive) and low-temperature performance (high and low temperature additive).

Vinyl chlorocarbonate and ethylene fluorocarbonate (FEC) are currently the main additives in the market, accounting for nearly 60% of the electrolyte additive market. Vc is a new type of organic film formation and overcharge protection additive, with good high and low temperature performance and anti inflation function, which can improve the capacity and cycle life of batteries. VC is a lithium-ion battery. When using VC as an additive to form a SEI film, a dense SEI film is formed on the anode surface, which prevents further reduction and decomposition of the electrolyte on the anode surface. Fec can be used as an organic solvent, organic synthesis intermediate, pharmaceutical intermediate, electronic chemical industry, electrolyte additive, etc. Among them, lithium-ion battery electrolyte additive is the main application market. Fec SEI membrane has good performance, and the present invention can form a dense structural layer without increasing impedance, improving the low-temperature performance of the electrolyte.