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

页码：11763 / 11768

页数：6

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