期刊
APPLIED ENERGY
卷 153, 期 -, 页码 48-55出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.apenergy.2014.12.010
关键词
Supercapacitor; Polypyrrole; Vanadium nitride; Carbon nanotube; Coating; Capacitance
资金
- NSERC Canada
Conductive polypyrrole (PPy) polymer - multiwalled carbon nanotubes (MWCNT) composites were synthesized using sulfanilic acid azochromotrop (SPADNS) and sulfonazo III sodium salt (CHR-BS) as anionic dopants for chemical polymerization of PPy. The composites were tested for application in electrodes of electrochemical supercapacitors (ES). Sedimentation tests, electrophoretic deposition experiments and Fourier transform infrared spectroscopy (FTIR) investigations showed that strong adsorption of anionic CHR-BS on MWCNT provided MWCNT dispersion. The analysis of scanning and transmission electron microscopy data demonstrated that the use of CHR-BS allowed the formation of PPy coatings on MWCNT. As a result, the composites, prepared using CHR-BS, showed higher capacitance, compared to the composites, prepared using SPADNS. The electrodes, containing MWCNT, coated with PPy showed a capacitance of 179 F g(-1) for active mass loading of 10 mg cm(-2), good capacitance retention at scan rates in the range of 2-100 mV s(-1) and excellent cyclic stability. Asymmetric ES devices, containing positive PPy-MWCNT electrodes and negative vanadium nitride (VN)-MWCNT electrodes showed significant improvement in energy storage performance, compared to the symmetric ES due to the larger voltage window. The low impedance and high capacitance of the individual cells paved the way to the development of modules with higher voltage, which showed good electrochemical performance. (C) 2014 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据