Flexible and high surface area composites of carbon fiber, polypyrrole, and poly(DMcT) for supercapacitor electrodes

被引：54

作者：

Davoglio, Rogerio A. ^{[1
]}

Biaggio, Sonia R. ^{[1
]}

Bocchi, Nerilso ^{[1
]}

Rocha-Filho, Romeu C. ^{[1
]}

机构：

[1] Univ Fed Sao Carlos, Dept Quim, BR-13560970 Sao Carlos, SP, Brazil

来源：

ELECTROCHIMICA ACTA | 2013年 / 93卷

关键词：

Polymeric composite supercapacitors; Carbon fiber composites; Conducting polymers; Disulfides; Bilayered film electrodes; HIGH-ENERGY DENSITY; ELECTROCHEMICAL CAPACITORS; LITHIUM BATTERIES; POLYMERIZATION; PERFORMANCE; POLYANILINE; PYRROLE; CATHODE; FILM;

D O I：

10.1016/j.electacta.2013.01.062

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Thin films of polypyrrole (Ppy) and poly-2,5-dimercapto-1,3,4-thiadiazole (poly(DMcT)) are electrochemically deposited on pieces of carbon fiber (CF) cloth, yielding flexible and high surface area composites that are characterized as electrodes for supercapacitors. A bilayered polymeric composite (CF/poly(DMcT)/Ppy) is obtained by depositing a nanometric layer of Ppy on CF already supporting a poly(DMcT) film. Electrochemical stability tests indicate that the Ppy film acts as a barrier that prevents the loss of the poly(DMcT) electroactive material, thus improving the charge-storage characteristics of the bilayered film even after 1000 cycles. Specific capacitance values of 460 +/- 50 and 1130 +/- 100 Fg(-1) are observed for electrodes made of the CF/Ppy and CF/poly(DMcT)/Ppy composites, respectively. Comparatively to similar Ppy composite materials used for supercapacitors, the bilayered film electrode here reported presents a significantly improved specific capacitance value. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：93 / 100

页数：8

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