凝胶型聚合物电解质的电导率与温度的关系

凝胶型聚合物电解质的电导率与温度的关系孙晓光，林云青，齐力，景遐斌，王佛松（中国科学院长春应用化学研究所长春１３００２２）关键词凝胶电解质，离子电导率，活化能无定形聚合物电解质电导与温度的依赖关系一般可用Ｖｏｇｅｌ－Ｔａｍｍａｎ－Ｆｕｌｃｈｅｒｃ（Ｖ...

Temperature Dependence of Ionic Conductivity of Polymer Gel Electrolytes

The temperature dependence of ionic conductivity in polytriethylene glycol dimethacrylate(PTREGD)-LiClO_4-propylene carbonate(PC) three component gel electrolytes was investigated.It is found that the dependence of ionic conductivity on temperature in the electrolytes can be expressed by Arrhenius equation. If the content of PC in the gel electrolyte is high enough,the influence of polymer matrix on ion migration can be neglected.Generally,the Arrhenius-type temperature dependence does not hold in the gel elctrolytes with high lithium salt content.The extent to which Arrhenius equation is applied depends upon the nature of lithium salt.However,LiBF_4 is an exception with which the nonArrhenius behaviour is observed.The activation energy for ion migration depends upon both the nature and the concentration of Li salt, and actually it is also a measure of conductance in the gel electrolyte.