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将实验室烧制的无机快离子导体盐Li1.3 Al0.3Ti1.7(PO4)3、PEO与LiClO4按照EO/Li=8,两种锂盐含量为变量进行复合,通过溶液浇注法制备得到PEO-LiClO4-Li1.3Al0.3Ti1.7(PO4)3复合聚合物电解质膜,以示差扫描热分析法(DSC)与电化学阻抗(EIS)测试其性能.DSC测试结果表明:按照EO/Li=8将Li1.3Al0.3Ti17(PO4)3、LiClO4与PEO复合的聚合物电解质中PEO的结晶度由50.34%下降到4.36%~28.53%.室温下该聚合物电解质所有试样的阻抗谱图在高频区呈现为压缩的半圆,在低频区为一条倾斜的直线,而在较高温度时,阻抗谱图主要为一条倾斜的直线.复合聚合物电解质PEO-LiClO4-Li1.3Al0.3Ti17(PO4)3的离子电导率遵从Ar-rhenius关系,在Li1.3Al03Ti1.7(PO4)3质量分数达到15%时,活化能最低,即4.494425 eV,此时电导率值最佳,373 K时为1.161×10-3S/cm和298 K时为7.985×10-6S/cm.

参考文献

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