单离子导电聚合物电解质膜的制备及电化学性能研究  

Synthesis and electrochemical performance of lithiumsingle-ion conductive polymer electrolyte membrances

作　　者：陈欣欣 邹海凤 陈卓 程琥 CHEN Xinxin;ZOU Haifeng;CHEN Zhuo;CHENG Hu(Key Laboratory of Functional Materials Chemistry of Guizhou Province,School of Chemistry and Materials Science,Guizhou Normal University,Guiyang 550001,China)

机构地区：[1]贵州师范大学化学与材料科学学院,贵州省功能材料化学重点实验室,贵阳550001

出　　处：《功能材料》2022年第8期8165-8169,共5页Journal of Functional Materials

基　　金：国家自然科学基金项目(22062004)。

摘　　要：以对苯乙烯磺酸钠为原料,通过一系列反应合成了单离子导体聚(对苯乙烯磺酰)(三氟甲基磺酰)亚胺锂(LiPSTFSI),将其与PEO按不同EO/Li^(+)共混,制备单离子导电聚合物电解质膜。研究表明,PEO/LiPSTFSI电解质膜在270℃下具有良好的热稳定性;在60℃时,EO/Li^(+)=16的电解质膜的离子电导率达到1.94×10^(-5)S/cm,且锂离子迁移数>0.85,接近于锂单离子导体;同时电解质膜表现出较好的电化学稳定性和界面性能。Single-ion conductor lithium poly(4-styrenesulfonyl(trifluoromethylsulfonyl)imide)(LiPSTFSI)was synthesized through a series of reactions using sodium 4-styrenesulfonate as raw material.Then it was blended with PEO according to different EO/Li^(+)to synthesize single-ion conducting polymer electrolyte membrane.The results show that PEO/LiPSTFSI electrolyte membrane has good thermal stability at 270℃.At 60℃,the ionic conductivity of the electrolyte membrane(EO/Li^(+)=16)is 1.94×10^(-5)S/cm,and the Li^(+)transference number is more than 0.85,which is close to the lithium single ion conductor.At the same time,the electrolyte membrane showed good electrochemical stability and interface performance.

关 键 词：单离子导体 锂离子电池 聚氧化乙烯 聚合物电解质 聚合物共混 

分 类 号：TM912.9[电气工程—电力电子与电力传动]