对蒙脱石进行改性, 并用直接挥发溶剂法制备有机蒙脱石/聚偏氟乙烯-六氟丙烯复合聚合物电解质. 用扫描电子显微镜和X射线衍射等对所制电解质性能进行表征, 用交流阻抗和充放电实验研究聚合物电池的电化学性质. 结果表明: 直接挥发溶剂法制得的复合聚合物膜呈蜂窝状, 孔穴丰富, 强度增加, 浸取电解液后室温离子电导率为1. 51 mS/cm, 电化学稳定窗口为5. 5 V;以LiCoO_2为正极制得的聚合物电池0. 1C充放电, 50次循环后容量保持率达到95. 3%, 倍率放电能力较好, 有机蒙脱石的加入可改善电池的电极界面性质, 提高电池充放电循环性能.
Montmorillonite was modified, and organo montmorillonite/poly(vinylidene)fluoride-hexafluoropropylene composed polymer electrolyte was prepared. Its morphologies and properties were characterized by scanning electron micrograph and XRD. The electrochemical properties of polymer batteries were studied with the AC impedance and charging-discharging test. The results show that the composed polymer membrane has rich micro-pores and exhibits 1. 51 mS/cm of ionic conductivity at room temperature, and its electrochemical stability window reaches 5. 5 V. When discharging at 0. 1 current rate, the capacity maintenance ratio of the polymer battery prepared by LiCoO_2 cathode material is 95. 3%after 50 cycles, and the polymer battery has excellent rate performance. By adding OMMT into polymer electrolyte, the interfacial impedance of polymer battery is stable, and its cycling performance is improved.
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