Preparation and Characterization of a Poly[Ni(salen)]/Multiwalled Carbon Nanotube Composite by in Situ Electropolymerization as a Capacitive Material
Preparation and Characterization of a Poly[Ni(salen)]/Multiwalled Carbon Nanotube Composite by in Situ Electropolymerization as a Capacitive Material
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DOI：
10.1021/jp111831y
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发表时间：
2011-05
影响因子：
3.7
通讯作者：
Fei Gao;Jianling Li;F. Kang;Yakun Zhang;Xindong Wang;F. Ye;Jun Yang
中科院分区：
文献类型：
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作者：
Fei Gao;Jianling Li;F. Kang;Yakun Zhang;Xindong Wang;F. Ye;Jun Yang
采用原位电聚合法制备了聚[Ni（salen）]与多壁碳纳米管（MWCNTs）的复合材料。生长的聚[Ni（salen）]填充多壁碳纳米管之间的间隙，并形成铁混凝土样的微观结构。结果表明，多壁碳纳米管的负载使聚[Ni（salen）]的掺杂水平和电化学可逆性得到了很大的提高。通过循环伏安法测定了复合材料的电荷扩散传输系数，揭示了聚[Ni（salen）]质量对复合材料电荷传输行为的影响。电化学阻抗谱和恒流充放电测试表明，小质量比（0.29/1和0.63/1）复合材料的直流欧姆电阻和交流欧姆电阻均明显低于MWCNTs。恒电流充放电测试还表明，通过引入聚[Ni（salen）]，复合材料的储存电荷的能力显著提高。
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)].