PVDF-HFP基复合微孔聚合物电解质膜的制备与改性  

Preparation and Modification of PVDF-HFP Matrix Complex Microporous Polymer Electrolyte Membrane

作　　者：刘辉[1] 龙尚俊 黄恒钧[1] 吴佳明[1] 尹杰[1] 周洁[1] 

机构地区：[1]黑龙江工程学院材料与化学工程学院,黑龙江哈尔滨150050

出　　处：《哈尔滨理工大学学报》2014年第5期14-17,共4页Journal of Harbin University of Science and Technology

基　　金：黑龙江工程学院大学生创新创业训练计划项目(201311802138);国家自然科学基金(81373083)

摘　　要：为了提高聚偏氟乙烯-六氟丙烯(PVDF-HFP)基电解质的离子电导率和机械强度,采用倒相法,制备出复合聚偏氟乙烯-六氟丙烯基电解质PVDF-HFP-Si O2.复合电解质的形貌、结构和电化学性能分别用SEM、XRD和交流阻抗法进行了表征.结果表明:纳米Si O2的加入增强了聚合物的拉伸强度,同时有效降低了聚合物的结晶度.PVDF-HFP-Si O2分解电压为5.1V,离子迁移数为0.81,聚合物电解质的电导率(25℃)为4.84×10-3S·cm-1.To improve the ionic conductivity and tensile intensity of poly vinylidenefluoride-hexafluoro propylene（PVDF-HFP） matrix polymer electrolyte,complex polymer electrolyte PVDF-HFP-SiO2 is prepared by phase inversion method.The morphology is characterized by scanning electron microscope （SEM）,the crystal structure of the electrolytes by X-ray diffraction （XRD） and the electrochemical properties of the electrolytes by electrochemical impedance spectra （EIS）.The result shows that addition of nano-SiO2 not only enhances the tensile intensity of polymer but also suppresses the crystallinity of polymer electrolyte.The electrochemical oxidation voltage of the PVDF-HFP-SiO2 polymer electrolyte is 5.1V and the correponding cation transference number is 0.81.The ionic conductivity （25℃） of the PVDF-HFP-SiO2 polymer electrolyte is 4.84 × 10-3S · cm-1

关 键 词：聚合物电解质膜 倒相法 纳米SIO2 聚偏氟乙烯-六氟丙烯共聚物 改性 

分 类 号：TM912[电气工程—电力电子与电力传动]