Sn_(0.85)Ta_(0.15)P_2O_7-聚四氟乙烯复合电解质的制备及其中温电性能研究

Synthesis and intermediate temperature electrical property of polytetrafluoroethylene-Sn_(0.85)Ta_(0.15)P_2O_7 composite electrolyte

采用超声波法制备了Sn_(0.85)Ta_(0.15)P_2O_7-聚四氟乙烯(PTFE)新型有机-无机固体离子复合电解质。运用X射线衍射(XRD)、扫描电子显微镜(SEM)、红外光谱和热分析仪对样品进行了表征,并且测定了电导率随实验条件的变化规律。热分析表明样品稳定性较好;XRD表明Sn_(0.85)Ta_(0.15)P_2O_7和PTFE混合没有发生反应生成新物质;SEM表明样品的致密性良好。电导率测试表明温度为160℃时电导率达到最大值2.8×10-2S/cm。

The new organic-inorganic ionic solid composite electrolyte Sn0.85Ta0.15P2O7-PTFE was prepared using an ultrasonic method.The product was characterized by infrared spectrometer,DSC-TGA analyzer,SEM and XRD.For the electrochemical determinations,the conductivity was measured by an AC impedance method.DSC-TGA proved that the sample had a high stability.XRD showed that there were only peaks corresponding well to Sn0.85Ta0.15P2O7 and to PTFE,without any formation of other substances.SEM showed that the density of sample was good.The highest conductivity was observed in unhumidified air to be 2.8×10^-2S·cm^-1 at 160℃.