Preparation and Characterization of a Poly[Ni(salen)]/Multiwalled Carbon Nanotube Composite by in Situ Electropolymerization as a Capacitive Material

详细信息    查看全文

• 作者：Fei Gao ; Jianling Li ; Feiyu Kang ; Yakun Zhang ; Xindong Wang ; Feng Ye ; Jun Yang
• 刊名：Journal of Physical Chemistry C
• 出版年：2011
• 出版时间：June 16, 2011
• 年：2011
• 卷：115
• 期：23
• 页码：11822-11829
• 全文大小：1175K
• 年卷期：v.115,no.23(June 16, 2011)
• ISSN：1932-7455

文摘

A composite of poly[Ni(salen)] and multiwalled carbon nanotubes (MWCNTs) was synthesized by in situ electropolymerization. As-grown poly[Ni(salen)] filled gaps between MWCNTs and formed a ferroconcrete-like microstructure. It was found that the doping level and electrochemical reversibility of poly[Ni(salen)] were greatly improved because of the support of MWCNTs. Values of the charge diffusion transport coefficient estimated by cyclic voltammetry revealed the effect of the mass of poly[Ni(salen)] on the charge transport behavior of composites. Both the direct ohmic resistance and the alternating ohmic resistance of a composite with small mass ratios (0.29/1 and 0.63/1) were obviously lower than those of MWCNTs which was demonstrated by electrochemical impedance spectroscopy and galvanostatic charge/discharge tests. Galvanostatic charge/discharge tests also showed that the ability to store charge was improved significantly for composites by incorporating poly[Ni(salen)].