ELECTRIC DOUBLE-LAYER CAPACITORS WITH NEW GEL ELECTROLYTES

被引：76

作者：

ISHIKAWA, M

IHARA, M

MORITA, M

MATSUDA, Y

机构：

[1] Department of Applied Chemistry and Chemical Engineering, Faculty of Engineering, Yamaguchi University, Ube, 755, Tokiwadai

来源：

ELECTROCHIMICA ACTA | 1995年 / 40卷 / 13-14期

关键词：

ELECTRIC DOUBLE LAYER CAPACITOR; GEL ELECTROLYTE; POLY(ACRYLONITRILE); TETRAALKYLAMMONIUM SALT;

D O I：

10.1016/0013-4686(95)00166-C

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Polymer gel electrolytes consisting of poly(acrylonitrile) (PAN), propylene carbonate(PC) as a plasticizer and tetraalkylammonium salts such as tetrabutylammonium perchlorate, tetraethylammonium perchlorate and tetraethylammonium tetrafluoroborate have been investigated for electric double-layer capacitors with activated carbon fiber cloth electrodes. The PAN, PC and tetraalkylammonium composites showed high ionic conductivity (above 10(-3) Scm(-1) at 298 K). The ionic conductivity increased with an increase in the salt concentration and a decrease in the size of each ion. The composites were electrochemically stable over a wide potential range (ca. 5.O V). The application of the PAN and tetraethylammonium tetrafluoroborate composites to the electric double-layer capacitors with activated carbon fiber cloths as polarizable electrodes resulted in large values of capacitance and high coulombic efficiency. The low leakage current at constant voltage floating (2 V) and the long voltage retention in the self-discharge test were obtained in the capacitor with tetraethylammonium tetrafluoroborate.

引用

页码：2217 / 2222

页数：6