PAN为基凝胶聚合物电解质自扩散系数的NMR研究  

NMR STUDIES ON SELF DIFFUSION COEFFICIENTS OF LITHIUM IONS IN PAN BASED GEL POLYMER ELECTROLYTES 

作　　者：李子荣[1,2,3] 孟庆安[1,2,3] 管荻华 王刚[1,2,3] 

机构地区：[1]中国科学院物理研究所磁学国家实验室 [2]北京科技大学化学系 [3]中国科学院物理研究所和凝聚态物理中心

出　　处：《物理学报》1999年第6期1175-1178,共4页Acta Physica Sinica

基　　金：国家自然科学基金

摘　　要：利用脉冲梯度场ＮＭＲ方法直接测量了不同温度下的不同组分的ＰＡＮ为基凝胶聚合物电解质ＰＡＮＥＣ／ＰＣＬｉＣｌＯ４中锂离子的自扩散系数Ｄ．结果表明，锂离子的自扩散系数Ｄ依赖于锂盐质量分数ｘ％，并且在ｘ从５到２０范围内，ｘ＝１０时Ｄ有最大值．Abstract The self diffusion coefficients D of lithium ions in PAN EC/PC LiClO 4 gel polymer electrolytes with different compositions and at different temperatures have been directly measured by field gradient NMR spin echo technique.The results indicated that self diffusion coefficients D of lithium ions were dependent on the mass ratio x % of lithium salt, and had a maximum at x =10 in the range of x =5 to 20.It was suggested that this was probably involved with transport mechanisms of the hopping of lithium ions,and with two kinds of interactions:the interaction between Li + ions and plasticizer EC,and the interaction between Li + ions and network polymer PAN

关 键 词：聚合物电解质 PAN 自扩散系数 NMR 锂离子 

分 类 号：O646.1[理学—物理化学]