应用阳离子开环聚合反应合成含二缩三乙二醇单甲醚侧链的梳形聚醚POE,并与高氯酸锂复配制成聚合物电解质.交流阻抗测试表明,当POE电解质内的氧锂比(O/L i)为20时,其电导率最高,室温下为10-4.43S/cm,80℃时则达到10-3.44S/cm.用DSC和XPS分别表征了链段运动能力和锂盐在POE中的溶解状态对电导率的影响.
A comb polymer was synthesized through cationic ring-opening polymerization starting from a monomer 3-hydroxymethyl-3-methyl-oxetane.The ion conductivity was measured by CHI660A electrochemical station under various lithium salt concentrations and various temperatures.The highest ion conductivity was recorded to be 10~(-4.43)S/cm at room temperature and 10~(-3.44)S/cm at 80 ℃.DSC results showed that the segment moves more difficultly with the increasing of lithium salts concentration.XPS found the existence of aggregating lithium ions in POE5 and POE10,and it suggested that POE20 had a suitable lithium concentration for polymer electrolyte.
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