Fabrication and characterization of polyaniline coated carbon nanofiber for supercapacitor

被引:209
作者
Jang, J
Bae, J
Choi, M
Yoon, SH
机构
[1] Seoul Natl Univ, Sch Chem Engn, Hyperstruct Organ Mat Res Ctr, Seoul 151742, South Korea
[2] Kyushu Univ, Inst Adv Mat Study, Fukuoka 8168580, Japan
关键词
carbon nanofibers; polyaniline; vapor deposition polymerization; supercapacitor;
D O I
10.1016/j.carbon.2005.05.039
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
Polyaniline coated carbon nanofiber was fabricated using one-step vapor deposition polymerization technique. Fourier transform infrared (FT-IR) spectra and transmission electron microscope (TEM) images indicated that uniform and ultrathin conducting polymer layers were formed on the carbon nanofiber surfaces regardless of the coating thickness. It was also confirmed that the thickness of polyaniline layer could be conveniently tuned by the feeding amount of monomer. The coating thickness was dependent on initiator/monomer ratio, the vacuum pressure of reaction chamber and polymerization temperature. Among them, the vacuum pressure was a major factor to control the coating thickness of polyaniline onto the carbon nanofiber surface. In addition, the electrochemical analysis demonstrated that polyaniline coated carbon nanofiber showed an improved performance as supercapacitor. The specific capacitance of polyaniline coated carbon nanofiber exhibited a maximum value of 264 F/g when the thickness of polyaniline layer was ca. 20 nm. (C) 2005 Elsevier Ltd. All rights reserved.
引用
收藏
页码:2730 / 2736
页数:7
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