| PAN为基凝胶聚合物电解质自扩散系数的NMR研究 |
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| 引用本文： | 李子荣,孟庆安,管荻华,王刚. PAN为基凝胶聚合物电解质自扩散系数的NMR研究[J]. 物理学报, 1999, 48(6): 1175-1178 |
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| 作者姓名： | 李子荣 孟庆安 管荻华 王刚 |
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| 作者单位： | (1)北京科技大学化学系，北京 100083; (2)中国科学院物理研究所磁学国家实验室，北京 100080; (3)中国科学院物理研究所和凝聚态物理中心，北京 100080 |
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| 基金项目： | 国家自然科学基金（批准号：59573013)资助的课题. |
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| 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抽PAN-EC/PL-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％，关且在x从5到20范围内，x=10时D有最大值.这与锂离子跳跃的传输机制及同时受到增塑剂EC与聚合物PAN网络的相互作用有关.关键词：
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| 关 键 词： | 聚合物电解质 PAN 自扩散系数 NMR 锂离子 |
| 收稿时间： | 1998-07-22 |
NMR STUDIES ON SELF DIFFUSION COEFFICIENTS OF LITHIUM IONS IN PAN-BASED GEL POLYMER ELECTROLYTES |
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| LI ZI-RONG,MENG QING-AN,GUAN DI-HUA and WANG GANG. NMR STUDIES ON SELF DIFFUSION COEFFICIENTS OF LITHIUM IONS IN PAN-BASED GEL POLYMER ELECTROLYTES[J]. Acta Physica Sinica, 1999, 48(6): 1175-1178 |
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| Authors: | LI ZI-RONG MENG QING-AN GUAN DI-HUA WANG GANG |
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| Abstract: | The self diffusion coefficients D of lithium ions in PAN-EC/PC-LiClO4 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 maxiumum 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. |
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