Electrochemical behaviors of novel composite polymer electrolytes for lithium batteries

被引：0

作者：

Guorong Chen Pengfei Shi Yongping Bai and Taibing FanDepartment of Applied Chemistry Harbin Institute of Technology Harbin China ^{[150001
]}

机构：

来源：

Journal of University of Science and Technology Beijing(English Edition) | 2004年 / 04期

关键词：

composite polymer electrolyte; ionic conductivity; electrochemical stability; Lewis acid-base model interaction;

D O I：

暂无

中图分类号：

TB332 [非金属复合材料];

学科分类号：

0805 ; 080502 ;

摘要：

<正> A novel composite polymer electrolyte was prepared by blending an appropriate amount of LiClO4 and 10% (mass fraction) fumed SiO2 with the block copolymer of poly (ethylene oxide) (PEO) synthesized by poly (ethylene glycol) (PEG) 400 and CH2C12. The ionic conductivity, electrochemical stability, interfacial characteristic and thermal behavior of the composite polymer electrolyte were studied by the measurements of AC impedance spectroscopy, linear sweep voltammetry and differential scanning calorimetry (DSC), respectively. The glass transition temperature acts as a function of salt concentration, which increases with the LiClO4 content. Lewis acid-base model interaction mechanism was introduced to interpret the interactive relation between the filled fumed SiO2 and the lithium salt in the composite polymer electrolyte. Over the salt concentration range and the measured temperature, the maximum ionic conductivity of the composite polymer electrolyte (10-4.41 S/cm) appeared at EO/Li=25 (mole ratio) and 30

引用

页码：359 / 363

页数：5

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