99.9% Vinylethylene Carbonate Vec For Lithium Ion Batteries

Vinylethylene Carbonate is mainly used as a film additive for lithium-ion batteries. This product has a high reduction potential, so in the process of chemical synthesis, it can prior to the electrolyte to make electrochemical reduction reaction on the surface of the graphite anode, and form a thicker and larger impedance SEI film. This film is stable at room and high temperature, and not easy to decompose, which can inhibit the reduction and decomposition reaction of the electrolyte on the surface of the graphite negative electrode and reduces the formation of gaseous products. The structure and performance of the negative electrode material are avoided, the capacity retention rate of the battery is improved at room temperature, especially at high temperature, and the flatulence of the battery is inhibited. The SEI film has good cycling performance, but the impedance is large, which is not conducive to the lithium deintercalation, the capacity and efficiency of the first charge and discharge are low.