电化学聚合单壁碳纳米管/聚苯胺复合物的电容特性研究

Preparation and Electrochemistry of SWNT/PANI Composite Films for Electrochemical Capacitors

采用原位电化学聚合含有饱和单壁碳纳米管(SWNT)的苯胺(ANI)溶液来制备单壁碳纳米管/聚苯胺(SWNT/PANI)复合膜,对复合膜的表面形貌与结构性质采用扫描电子显微镜进行观察,并用循环伏安法,充放电测试,和交流阻抗测试等手段对复合膜的电化学电容特性进行详细探讨.实验结果表明,纯PANI和SWNT/PANI复合物的比电容量分别为156.5F/g,186.4 F/g.由复平面阻抗谱图的最高频率点可以求出纯PANI和SWNT/PANI复合膜的内阻分别为15.8,6.7Ω.

Single-walled carbon nanotube/polyaniline （SWNT/PANI） composite films were prepared by in situ electrochemical polymerization of an aniline solution containing different SWNT contents. Surface morphology and structural properties of these PANI-based films were examined by a scanning electron microscope. The electroehemical capacitance properties of these films were investigated with cyclic voltammetry, charge-discharge tests, and ac impedance spectroscopy and so on in detail. The results show that the specific capacitance for the pure PANI and SWNT/PANI composite are 156.5F/g and 186.4 F/g, respectively. The ohmic resistance in the PANI and SWNT/ PANI system are 15.8 and 6.7 Ω, respectively.