PMMA-[BMIM]PF_6-非质子溶剂复合型凝胶电解质的制备和性能  

Composite Gel polymer Electrolytes Prepared of MMA in [BMIM]PF_6 and Aprotic Solvents

作　　者：黄雪原[1] 郭建平[1] 孙艳美[1] 沈加春[1] 陈小花[1] 尹笃林[1] 

机构地区：[1]湖南师范大学化学化工学院资源精细化与先进材料湖南省高校重点实验室,湖南长沙410081

出　　处：《精细化工》2009年第9期833-837,849,共6页Fine Chemicals

基　　金：湖南省科技计划项目(2006JT2009;2007FJ4240)资助~~

摘　　要：采用烯类单体MMA在离子液体[BMIM]PF6和PC、DMC等形成的混合溶液中聚合,合成一系列PMMA-[BMIM]PF6-非质子溶剂复合型凝胶电解质,并对其性能进行了研究。结果表明,当m([BMIM]PF6)∶m(PC)=45∶55时,凝胶电解质PMMA-PC-[BMIM]PF6的室温电导率值为3.44×10-3S/cm,当m([BMIM]PF6)∶m(DMC-PC)=35∶65时,PMMA-LiPF6-(PC-DMC)-[BMIM]PF6的室温电导率值为10.05×10-3S/cm,并随温度升高而增加,变化规律符合VTF方程。凝胶电解质热分解温度都在250℃以上,在80℃时热失重小于0.97%。锂离子的迁移数约为0.3。电化学窗口高达5.1V。The composite gel polymer electrolytes containing ionic liquid [BMIM]PF6 in aprotic solvents were prepared and invesigated.The gel polymer electrolyte PMMA-PC-[BMIM]PF6 showed a highly ionic conductivity about 3.44×10-3 S/cm when the mass ratio of [BMIM]PF6∶PC is 45∶55.The gel polymer electrolyte PMMA-LiPF6-（PC-DMC）-[BMIM]PF6 showed a highly ionic conductivity about 10.05×10-3 S/cm when the mass ratio of [BMIM]PF6∶（DMC-PC） is 35∶65.The electric conductivity of the polymer electrolyte increases with increasing temperature, and fits the VogelTamman-Fulcher （VTF） equation. The gel polymer electrolytes exhibited a greater thermal stability than the traditional non-aqueous electrolyte systems including organic solvent. Most of them exhibited high decomposition temperatures above 250 ℃,and the weight loss was found less than O. 97% （mass fraction） up to 80 ℃. The transference number of lithium ions in the polymer electrolyte is about O. 3. The electrochemical window is up to 5.1 V.

关 键 词：复合型凝胶电解质 离子电导率 热稳定性 锂离子迁移数 电化学窗口 功能材料 

分 类 号：O632.5[理学—高分子化学]