聚乙撑二氧噻吩/多壁碳纳米管复合材料的制备与电化学性能研究

Preparation of Poly(3,4-ethylenedioxythiophene)/Carbon Nanotubes Composites and their Electrochemical Propertiers

以三氯化铁为氧化剂,通过原位聚合法制备聚乙撑二氧噻吩/多壁碳纳米管复合材料.热重分析结果表明:聚乙撑二氧噻吩/多壁碳纳米管复合材料相对于聚乙撑二氧噻吩具有更好的热稳定性;采用傅里叶变换红外光谱(FT-IR)、扫描电镜(SEM)对产物的结构与形貌进行表征,聚乙撑二氧噻吩在多壁碳纳米管表面形成了均匀的包覆层,两者之间存在一定的界面作用.在1 mol/L氯化钾(KCl)溶液中,采用循环伏安测试法(CV)研究样品的电化学性能,聚乙撑二氧噻吩/多壁碳纳米管复合材料的比电容可达139.8 F/g.

Poly （ 3,4-ethylenedioxythiophene ）/multiLwalled carbon nanotubes （ PEDOT/MWCNTs ） nanocomposites were prepared by in-situ polymerization using ferric chloride as oxidant. The thermal stability of the PEDOT/MWCNTs nanocomposites was improved significantly compared with that of PEDOT which were characterized by thermogravimetric analysis （TGA） . The structure and morphology of the samples were characterized by Fourier transform infrared spectrometry （PT-IR） and scanning electron mi- croscopy （SEM）. The results showed that PEDOT formed a uniform coating on the surface of MWCNTs and there was a certain π-π interaction between PEDOT and MWCNTs. The electrochemical properties of the samples were investigated by cyclic voltammetry test in 1 mol/L KCl. The specific capacitance of the PEDOT/MWCNTs nanocomposite was up to 139.8F/g and had the good electrochemical activity.