Synthesis and electrochemical characterization of PEO-based polymer electrolytes with room temperature ionic liquids

被引：174

作者：

Cheng, Hu ^{[1
]}

Zhu, Changbao ^{[1
]}

Huang, Bin ^{[1
]}

Lu, Mi ^{[1
]}

Yang, Yong ^{[1
]}

机构：

[1] Xiamen Univ, Dept Chem, State Key Lab Phys Chem Solid Surface, Xiamen 361005, Peoples R China

来源：

ELECTROCHIMICA ACTA | 2007年 / 52卷 / 19期

基金：

中国国家自然科学基金;

关键词：

gel polymer electrolytes; ionic liquid; ionic conductivity; lithium polymer battery; 1-butyl-4-methylpyridinium bis(trifluoromethanesulfonyl)imide; GEL ELECTROLYTES; LITHIUM-SALTS; PHYSICOCHEMICAL PROPERTIES; DIFFUSION-COEFFICIENT; CONDUCTIVITY; BATTERIES;

D O I：

10.1016/j.electacta.2007.02.062

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

New gel polymer electrolytes containing 1-butyl-4-methylpyridinium bis(trifluoromethanesulfonyl)imide (BMPyTFSI) ionic liquid are prepared by solution casting method. Thermal and electrochemical properties have been determined for these gel polymer electrolytes. The addition of BMPyTFSI to the P(EO)(20)LiTFSI electrolyte results in an increase of the ionic conductivity, and at high BMPyTFSI concentration (BMPy+/Li+ = 1.0), the ionic conductivity reaches the value of 6.9 x 10(-4) S/cm at 40 degrees C. The lithium ion transference numbers obtained from polarization measurements at 40 degrees C were found to decrease as the amount of BMPyTFSI increased. However, the lithium ionic conductivity increased with the content of BMPyTFSI. The electrochemical stability and interfacial stability for these gel polymer electrolytes were significantly improved due to the incorporation of BMPyTFSI. (C) 2007 Published by Elsevier Ltd.

引用

页码：5789 / 5794

页数：6

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