Electrochemical properties of leucoemeraldine, emeraldine, and pernigraniline forms of polyaniline/multi-wall carbon nanotube nanocomposites for supercapacitor applications

被引：170
作者：
Yoon, Seung-Beom [1 ]
Yoon, Eun-Hyea [1 ]
Kim, Kwang-Bum [1 ]
机构：
[1] Yonsei Univ, Dept Mat Sci & Engn, Seoul 120749, South Korea
来源：
JOURNAL OF POWER SOURCES | 2011年 / 196卷 / 24期
基金：
新加坡国家研究基金会;
关键词：
Supercapacitor; Polyaniline; Multi-wall carbon nanotubes; Oxidation state; Specific capacitance; TRANSPORT-PROPERTIES; HIGH-PERFORMANCE; OXIDATION-STATE; COMPOSITE FILMS; MICROELECTRODE; FABRICATION; BEHAVIOR; POLYMERIZATION; CAPACITANCE; MECHANISM;
D O I：
10.1016/j.jpowsour.2011.08.107
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：
We report on the synthesis and electrochemical properties of leucoemeraldine base, emeraldine salt and pernigraniline base forms of polyaniline (PAN!) in the form of nanocomposites with MWNTs. The oxidation state of PANI in the composite is controlled by doping and dedoping of the emeraldine salt form of PANI/MWNT composite, which is prepared through chemical polymerization, using oxidizing and reducing agents without changing the morphology of PANI in the composite and is confirmed by ultraviolet-visible spectroscopy (UV-vis) spectroscopy and Fourier transform infrared (FT-IR) spectroscopy. The electrochemical and pseudocapacitive properties of the composites are investigated using cyclic voltammetry and analyzed with respect to the oxidation state of polyaniline. The PANI/MWNT nanocomposites show specific capacitance values of 217 Fg(-1) 328 Fg(-1) and 139 Fg(-1) for leucoemeraldine base, emeraldine salt and pernigraniline base, respectively. Electrochemical impedance spectroscopy is performed to explain the different electrochemical properties of PANI in different oxidation states. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码：10791 / 10797
页数：7
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