TFP阻燃剂在锂离子电池中的应用  

Application of TFP as flame retardant for Li-ion battery

作　　者：盛喜忧[1] 仇卫华[1] 王赛[1] 余碧涛[1] 

机构地区：[1]北京科技大学无机非金属材料系,北京100083

出　　处：《电池》2007年第2期92-94,共3页Battery Bimonthly

基　　金：国家自然科学基金资助项目(50472093)

摘　　要：为了提高锂离子电池的安全性,合成了阻燃剂三氟乙氧基磷酸酯(TFP),讨论了TFP含量对1.0 mol/L LiPF6/EC+DMC(体积比1∶1)电解液的可燃性和电化学性能的影响。结果表明:电解液的可燃性和电导率随着TFP含量的增大而降低;当TFP含量大于8.0%时,电解液不可燃。TFP含量为10.0%时,电解液的电导率由10.21 mS/cm(不含TFP)降至8.79 mS/cm(20℃);添加TFP对电解液的分解电压没有影响。当TFP含量为5.0%和10.0%时,Li/LiCoO2半电池的最高放电容量由126 mAh/g(不含TFP)分别增加到145 mAh/g和129 mAh/g。In order to improve the safety performance of Li-ion battery, tris（2,2,2-trifluoroethoxyl） phosphate （ T FP） flame retardant was synthesized. The effects of the TFP content on the flammability and electrochemical performance of 1.0 mol/L LiPF6/EC ＋ DMC （1 ： 1, V/V） electrolyte were discussed. The results showed that the flammability and the conductivity of the electrolyte decreased with the increasing of the TFP content. When the TFP content was above 8.0%, the electrolyte was nonflammable. When the TFP content was 10.0%, the conductivity of the electrolyte decreased from 10.21 mS/cm （no TFP） to 8.79 mS/cm（20 ℃）. The decomposition voltage of the electrolyte was not effected by adding TFP. The maximal discharge capacity of Li/LiCoO2 half cell increased from 126 mAh/g （no TFP） to 145 mAh/g and 129 mAh/g when the TFP content was 5.0% and 10.0% ,respectively.

关 键 词：阻燃剂 电解液 三氟乙氧基磷酸酯(TFP) 锂离子电池 

分 类 号：TM912.9[电气工程—电力电子与电力传动]