Vinylene carbonate(VC),as a lithium-ion battery additive,can significantly improve the cycling performance of lithium-ion batteries.Therefore,the industrialized production of high-purity VC is of great significance and value.VC with high purity was synthesized in this study by using vinyl chloroethylene carbonate(CEC)as raw material,triethylamine(TEA)as acid binding agent,dimethyl carbonate(DMC)as solvent,2,6-di-tert-butyl-4-methylphenol(BHT),tetrabutylammonium bromide(TBAB)and phenothiazine(PTZ)as excipients,and the structural characteristics of the structure were determined by infrared and nuclear magnetic characterization.The results showed that when the dosage of CEC was 62.50 g,DMC was 89.09 g,TBAB was 1.00 g,BHT was 0.50 g,PTZ was 0.50 g and TEA was 68.24 mL,the optimum conditions for the synthesis of VC were obtained;Under this optimal conditions,the conversion rate of CEC was 68.10％,the purity of VC was 98.27％,and the yield of VC was 66.92％.It has been verified that the reaction is endothermic,the kinetic order of the reaction is first order.
维普
万方数据