Morphological and electrochemical characterization of a poly(3-methylthiophene)/PVDF composite

被引：10

作者：

Benedetti, Joao E. ^{[1
]}

Canobre, Sheila C. ^{[1
]}

Fonseca, Carla P. ^{[1
]}

Neves, Silmara ^{[1
]}

机构：

[1] Univ Sao Francisco, LCAM, Programa Posgrad Engn & Ciencia Mat, BR-13251900 Itatiba, SP, Brazil

来源：

ELECTROCHIMICA ACTA | 2007年 / 52卷 / 14期

基金：

巴西圣保罗研究基金会;

关键词：

composite; poly(3-methylthiophene); supercapacitor; template synthesis; morphology;

D O I：

10.1016/j.electacta.2007.01.009

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Composite electrodes were prepared via electrochemical polymerization of 3-methylthiophene in porous PVDF membranes of various thicknesses. The electrochemical properties were determined by cyclic voltammetry and charge-discharge tests and the possible correlation of the results with the morphology of the host membranes was examined. The best definition of n- and p-doping/undoping processes and the biggest capacitance (82 Fg(-1)) were obtained with a 27.5 mu m-thick composite. Further characterization of this composite using electrochemical impedance spectroscopy revealed three behaviors associated with variation in the oxidation state of poly(3-methylthiophene) during transition from the n-undoping to p-doping states. The behavior of the charge transfer resistance and the double layer capacitance as a function of the applied potential were also determined. (c) 2007 Elsevier Ltd. All rights reserved.

引用

页码：4734 / 4741

页数：8

共 23 条

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