In situ preparation of poly(ethylene oxide)-SiO2 composite polymer electrolytes

被引：200

作者：

Liu, Y ^{[1
]}

Lee, JY ^{[1
]}

Hong, L ^{[1
]}

机构：

[1] Natl Univ Singapore, Dept Environm Chem & Engn, Singapore 119260, Singapore

来源：

JOURNAL OF POWER SOURCES | 2004年 / 129卷 / 02期

关键词：

nanocomposite; lithium battery; sol-gel; ultraviolet irradiation; poly(ethylene oxide); solid polymer electrolyte;

D O I：

10.1016/j.jpowsour.2003.11.026

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Amorphous poly(ethylene oxide) (PEO)-SiO2 composites are prepared by in situ reactions that involve the simultaneous formation of the polymer network and inorganic nanoparticles. The polymer matrix is formed by ultraviolet irradiation of a PEO macromer, and silica is produced in situ by the sol-gel method. The PEO-SiO2 composite mixed with LiBF4 is used as a lithium-ion conducting solid electrolyte and electrochemical transport properties such as ionic conductivity and Li+ transference number are measured. A significant increase in the Li+ transference number, up to 0.56, is found together with a slight decrease in the ionic conductivity. The results are interpreted in terms of interactions between the surface OH groups of the inorganic particles, the cations, the anions, and the ether oxygen atoms on the PEO backbone. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：303 / 311

页数：9

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