侧链枝化的磷酸酯型聚合物电解质的合成与性能研究

Preparation and performances of electrolyte based on phosphate-type polymer containing branch side chains

以聚乙二醇200、二乙二醇单甲醚等与三氯氧磷反应制备得到枝化结构的磷酸酯单体,其末端为丙烯酸酯基团。紫外引发聚合制备聚合物电解质,考察了磷酸酯单体的分子量、温度、盐浓度对聚合物电解质电导率的影响。研究表明,在测试盐浓度下,复合体系的最大室温电导率对应的LiClO4盐浓度都为5%,PEP200_3与LiClO4复合后室温电导率最高,可达1.80×10-5S/cm。

Phosphate monomers with branch structure were prepared by reacting polyethylene glycol, diethylene glycol monomethyl ether, etc. with phosphorus oxychloride, endcapped with acrylate groups. Polymer electrolytes were obtained by UV-curing. Influences of macromolecular weight of phosphate monomers, temperature and lithium salt content to ionic conductivity of polymer electrolyte were studied. The results showed that under given salt contents, all polymer electrolyte systems showed the highest ambient ionic conductivity at the lithium salt content of 5% weight of polymers, and system of PEP200_3 complexing with LiClO4 showed the highest value at room temperature, reaching 1.80 × 10^-5 S/cm.