Synthesis of polypyrrole and carbon nano-fiber composite for the electrode of electrochemical capacitors

被引：93

作者：

Kim, JH ^{[1
]}

Sharma, AK ^{[1
]}

Lee, YS ^{[1
]}

机构：

[1] Korea Inst Energy Res, Energy Convers & Storage Res Ctr, Taejon 305343, South Korea

来源：

MATERIALS LETTERS | 2006年 / 60卷 / 13-14期

关键词：

polypyrrole; vapor grown carbon fiber; nano-composite; pseudo-capacitance; electrochemical capacitor; supercapacitor;

D O I：

10.1016/j.matlet.2005.12.002

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Nano-thin polypyrrole (PPy) films were deposited on vapor grown carbon fibers (VGCF) by using an in situ chemical polymerization of the monomer in the presence of FeCl3 oxidant. An ultrasonic cavitational stream was used during polymerization of pyrrole, to enable the deposition of uniformly nano-thin PPy films on the surface of VGCF. The PPy/VGCF composite was characterized by FTIR spectroscopy. Surface morphology of the polymer films was characterized by using scanning electron microscopy and scanning transmission electron microscopy. The capacitance of the composite electrodes was investigated with cyclic voltammetry. As results of this study, thinner layer of PPy in the composite electrode (< 10 nm) was effective to obtain fully reversible and very fast Faradaic reaction. Hence, most mass of the PPy could contribute to the pseudo-capacitive charge storage. This namo-thin PPy layer exhibited higher specific capacitance of similar to 588 F g(-1) at 30 mV s(-1) and similar to 545 F g(-1) at 200 mV s(-1) along with an excellent power capability. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：1697 / 1701

页数：5

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