PEO/LiClO_4复合体系电解质膜的固体NMR研究

作     者：欧阳智 陈旸 姚叶锋 陈群 OUYANG Zhi;CHEN Yang;YAO Yefeng;CHEN Qun

作者机构：华东师范大学物理系上海市磁共振功能成像重点实验室上海200062 

出 版 物：《高分子学报》 (Acta Polymerica Sinica)

年 卷 期：2007年第17卷第12期

页      面：1196-1200页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070305[理学-高分子化学与物理] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 

基　　金：国家自然科学基金(基金号20474019) 上海市科委重大基础研究(项目号04DZ14002)资助项目 

主　　题：聚合物固体电解质 PEO/HClO4复合物 固体高分辨核磁共振碳谱 电导率 结晶结构 

摘      要：Lithium perchlorate/poly（ethylene oxide）complex,as potential polymer electrolytes,has attracted much research interests in the past decades,due to its great applicational ***,despite of great efforts,the mechanism of ion conducting of the system is still a topic with *** this work,the（）13C CP/MAS spectra of a series of PEO/LiClO4 complexes were measured with different *** is found that for the extensively dried samples,the（）13C CP/MAS spectrum can exhibit up to 11 narrow peaks and the characteristics of the spectrum varies greatly with the ***（）13C spin-lattice relaxation time（T1）of these narrow peaks are found to be comparable to that of the neat PEO crystalline region,indicating these narrow peaks are corresponding to the complexed crystalline *** the other hand,the（）1H T1ρ of the narrow peaks are much longer than that of the neat PEO crystalline region,suggesting that the chain motion of PEO in the complex is greatly restricted due to the interaction between the oxygen of PEO and Li+.The aforementioned 11 peaks are assigned to three complexed crystalline *** conductivity of the complex sample decreases greatly when [O]∶ molar ratio decreases to 4∶1,while half of the （）13C peaks that are attributed to one crystalline structure varnish,indicating that there should exist certain kind of correlation between the complexed crystalline structure and the conductivity.