聚(二甲基丙烯酸多缩乙二醇酯-甲基丙烯酸锂)固体电解质研究

SINGLE-ION CONDUCTION IN POLY(OLIGO(OXYETHYLENE) BI-METHACRYLATE)-CO- (LITHIUM METHACRYLATE)

以聚乙二醇(PEG)为原料,在PEG端基引入双键,合成了制备聚合物固体电解质的基体材料单体——二甲基丙烯酸多缩乙二醇酯(MEO_nM)。并研究了MEO_nM与甲基丙烯酸锂(MALi)的共聚、成膜反应,制备了单离子导电的共聚物薄膜。该薄膜既具有良好的导电性又具有良好的力学性能。其最高室温电导率可达10^(-6)Scm^(-1),100℃时可达10^(-4)Scm^(-1);而且在直流电压连续作用下,电导率-时间稳定性好,是理想的聚合物电解质材料。本文还研究了影响共聚物薄膜导电性和成膜性的因素。并采用DSC、X射线衍射等分析手段对共聚物的结构和形态进行了研究。

Macro-monomers of different molecular weight MEOnM(n from 5 to 25),which contain double-bonds on the terminal group of PEG,were prepared. Then studied the copolymerization of MEOnM and Lithium methacrylate (MALi), preparing single-ion conducting films of Poly (MEOnM-MALi). The maximum conductivity of the film can reach 10-6 scm-1 at room temperature,and 10-4 scm-1 at 100℃- The films were tough and of good strength. Under continued DC voltage,their conductivities were stable. IR,X-rays diffraction,differential scanning calorimeter were used to determine the structure and pattern of the macro-monomers and copolymers.