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以偶氮二异丁腈(AIBN)为引发剂,硫酰氯(SO2Cl2)为氯化剂,对碳酸乙烯酯(EC)进行氯化,合成了氯代碳酸乙烯酯(CEC);在反应温度65℃,硫酰氯滴加时间72 min,反应时间90 min,n(EC)∶n(SO2Cl2)=1∶1.3,n(AIBN)∶n(EC)=1∶200的条件下,CEC的收率达85.81%。以氟化钾(KF)为氟化剂在溶剂中对CEC进行氟化,得到锂离子电池电解液添加剂氟代碳酸乙烯酯(FEC);在反应温度75℃,反应时间1.5～2 h,n(CEC)∶n(KF)=1∶1.3,V(CEC)∶V(乙腈)=1∶1的条件下,FEC的收率达71.86%。采用红外光谱及气质联用分析对产物进行了结构表征。
Chlorinated ethylene carbonate (CEC) was synthesized by chlorination of ethylene carbonate (EC) with azobisisobutyronitrile (AIBN) as initiator and sulfuryl chloride (SO2Cl2) as chlorinating agent. The reaction time was 72 min, the reaction time was 90 min, the yield of CEC under the condition of n (EC): n (SO2Cl2) = 1: 1.3, n (AIBN): n Up to 85.81%. Fluorinated CEC with potassium fluoride (KF) as a fluorinating agent in a solvent to obtain fluorinated ethylene carbonate (FEC) as an electrolyte for lithium ion battery electrolyte; reaction temperature is 75 ° C., reaction time is 1.5 to 2 h, n (CEC): n (KF) = 1: 1.3, V (CEC): V (acetonitrile) = 1: 1, the yield of FEC reached 71.86%. The products were characterized by FTIR and GC-MS.