有限域聚合法制备碳纳米管-聚苯胺复合材料及其电化学性能

通过有限域聚合法将聚苯胺(PANI)均匀地生长在碳纳米管(CNTs)表面, 得到CNTs-PANI纳米复合材料. 通过透射电子显微镜(TEM)、扫描电子显微镜(SEM)、傅立叶变换红外(FTIR)光谱对样品的形貌及成分进行表征. 将得到的复合材料组装成电化学超级电容器, 进行电化学的循环伏安和恒流充放电测试. 结果显示, 运用此有限域聚合法所制备的复合材料中PANI 可以非常均匀地包裹在CNTs表面, 复合材料的比容量可以达到117.7 F·g-1(有机电解液), 远远高于所用纯碳纳米管(25.0 F·g-1)和纯聚苯胺(65.0 F·g-1)的比容量, 从而表明有限域聚合法是一良好的纳米复合材料的制备方法.

Preparation and Electrochemical Properties of CNTs-PANI Composite Material via Finite Field Polymerization

Finite field polymerization was applied to prepare carbon nanotubes-polyaniline (CNTs-PANI) composite based on coating polyaniline on the surface of the CNTs. The microstructure and component of the obtained materials were characterized by transmission electron microscope (TEM), scanning electron microscope (SEM), and Fourier transform infrared (FTIR) spectroscopy. The electrochemical performances of the samples were tested by cyclic voltammogram and galvanostatic charge/discharge by assembling the materials into electrochemical supercapacitors. The results showed that PANI could symmetrically grow on the surface of the CNTs by the finite field method. The specific capacitance of the obtained composite material was about 117.7 F·g-1 (organic electrolyte) whereas the specific capacitances of the pure CNTs and the pure PANI were about 25.0 and 65.0 F·g-1 at the same conditions. All these indicated that the finite field polymerization was a promising method to prepare nano-composite.