Nuclear magnetic resonance studies of nanocomposite polymer electrolytes

被引：20
|
作者：
Chung, SH [1 ]
Wang, Y
Greenbaum, SG
Marcinek, M
Persi, L
Croce, F
Wieczorek, W
Scrosati, B
机构：
[1] CUNY City Coll, Hunter Coll, Dept Phys, New York, NY 10021 USA
[2] Warsaw Univ Technol, Dept Chem, PL-00664 Warsaw, Poland
[3] Univ Roma La Sapienza, Dept Chem, I-00185 Rome, Italy
来源：
JOURNAL OF PHYSICS-CONDENSED MATTER | 2001年 / 13卷 / 50期
关键词：
D O I：
10.1088/0953-8984/13/50/336
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The origin of the ionic conductivity enhancement in polymer electrolytes that occurs on adding inorganic oxide powders was explored by H-1 and Li-7 nuclear magnetic resonance. Ionic and molecular self-diffusion coefficients determined by pulsed field gradient spin-echo measurements demonstrate that lithium ionic diffusivity is enhanced in the composites, but this enhancement is not attributed to polymer segmental mobility. Two different systems were investigated: a high-molecular-mass poly(ethylene oxide)-LiClO4 complex with nanoscale TiO2; and a low-molecular-mass poly(ethylene glycol)-LiClO4 solution with Al2O3 In the latter case the effect of varying the alumina surface acidity or basicity was considered.
引用
收藏
页码：11763 / 11768
页数：6
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