Electrochemical and spectroscopic investigations of a gel polymer electrolyte of poly(methylmethacrylate) and zinc triflate

被引：33

作者：

Kumar, GG ^{[1
]}

Sampath, S ^{[1
]}

机构：

[1] Indian Inst Sci, Dept Inorgan & Phys Chem, Bangalore 560012, Karnataka, India

来源：

SOLID STATE IONICS | 2005年 / 176卷 / 7-8期

关键词：

gel polymer electrolyte; zinc triflate; polymethylmethacrylate; vibrational spectroscopy;

D O I：

10.1016/j.ssi.2004.11.007

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：

A gel polymer electrolyte (GPE) film comprising poly(methyl methacrylate), ethylene carbonate (EC), propylene carbonate (PC) and zinc triflate (ZnTr) is prepared and characterized by electrochemical and spectroscopic techniques. The GPE is optimized to contain minimum quantity of the liquid components required for the gel formation with a maximum specific conductivity (sigma) of (1.3 +/- 0.45) x 10(-3) S cm(-1) at (27 +/- 1) degreesC. The variation of sigma with temperature follows an Arrhenius behavior and the activation energy for the optimum composition is determined to be 0.19 eV. Ac impedance and cyclic voltammetric studies indicate electrochemical activity of Zn/Zn2+ couple in the GPE. Cyclic voltammetry and charge-discharge cycling studies reveal intercalation/deintercalation of Zn2+ in gamma-MnO2. FT-Raman spectroscopy has been used to follow the changes in the ionic environment in the GPE. The symmetric stretching mode of triflate anion (v(s)SO(3)) has been used as a probe to follow the presence of free ions, ion pairs and higher aggregates. (C) 2004 Elsevier B.V All rights reserved.

引用

页码：773 / 780

页数：8

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