含[AMIM]BF_4的聚甲基丙烯酸甲酯基凝胶聚合物电解质的制备与改性  

Preparation and Modification of Poly(methyl methacrylate)based Gel Polymer Electrolytes Containing BF_4

作　　者：陈小花[1] 郭建平[1] 陈林[1] 唐斌艳[1] 尹笃林[1] 

机构地区：[1]湖南师范大学化学化工学院,长沙410081

出　　处：《应用化学》2011年第8期869-873,共5页Chinese Journal of Applied Chemistry

基　　金：湖南省科技计划项目(2006JT2009;2009FJ3052)资助

摘　　要：用两步法合成了离子液体1-烯丙基-3-甲基咪唑四氟硼酸盐([AMIM]BF4),将聚甲基丙烯酸甲酯(PMMA)引入离子液体[AMIM]BF4中,制备出含离子液体[AMIM]BF4的新型凝胶聚合物电解质,采用非质子溶剂、纳米SiO2等对其进行了改性。用FT-IR、交流阻抗(AC)、TG、SEM等测试技术对其结构和性能进行了表征。结果表明,非质子溶剂碳酸丙烯酯(PC)、碳酸二甲酯(DMC)和纳米SiO2的加入使聚合物电解质的室温离子电导率增大,达5.25×10-3S/cm;电导率与温度的关系符合Arrhenius方程;几种凝胶聚合物电解质的热分解温度均高于300℃,显示出良好的热稳定性。A room temperature ionic liquid, 1-allyl-3-methylimidazolium tetrafluoroborate （ [ AMIM ] BF4 ） was prepared by a two-step synthesis. Then gel polymer electrolytes （ GPE ） prepared by incorporating the ionic liquid [ AMIM] BF4 and poly （methyl methacrylate） （PMMA） were modified with aprotic solvents propylene carbonate（PC） and dimethyl carbonate （DMC） and SiO2 nano particles. The structure and properties of the GPE were studied by means of fourier transform infrared spectroscopy （FF-IR） , A. C. impedance （AC） , thermogravirnetry（ TG）, and scanning electron microscope（SEM）. The results showed that the introduction of aprotic solvents PC-DMC and nano-SiO2 particles increased the ionic conductivity of the GPE, which showed a highly ionic conductivity of up to 5.25 × 10 -3 S/crn at room temperature. In addition, the conductive behavior of the GPE follows an Arrhenius equation. The gel polymer electrolytes shows high thermal stability and tends to decompose at temperature higher than 300 ℃.

关 键 词：凝胶聚合物电解质 离子电导率 离子液体 非质子溶剂 纳米SIO2 

分 类 号：O632.5[理学—高分子化学]