物理化学学报 >> 2012, Vol. 28 >> Issue (02): 373-380.doi: 10.3866/PKU.WHXB201112021

电化学和新能源 上一篇    下一篇

可快速充放电聚吡咯/碳纳米管复合材料电化学聚合与表征

朱剑波1,2, 徐友龙1,2, 王杰1,2, 王景平1,2   

  1. 1. 西安交通大学, 电子陶瓷与器件教育部重点实验室, 西安 710049;
    2. 西安交通大学, 国际电介质研究中心, 西安 710049
  • 收稿日期:2011-09-26 修回日期:2011-11-21 发布日期:2012-01-11
  • 通讯作者: 徐友龙 E-mail:ylxu@mail.xjtu.edu.cn
  • 基金资助:

    国家高技术研究发展计划(863) (2007AA03Z249)和国家自然科学基金(20804030)资助项目

Electropolymerization and Characterization of Fast Charge-Discharge PPy/F-SWNTs Composite Materials

ZHU Jian-Bo1,2, XU You-Long1,2, WANG Jie1,2, WANG Jing-Ping1,2   

  1. 1. Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education, Xi'an Jiaotong University, Xi'an 71004 9. P.R. China;
    2. International Center for Dielectric Research, Xi'an Jiaotong University, Xi'an 71004 9. P.R. China
  • Received:2011-09-26 Revised:2011-11-21 Published:2012-01-11
  • Contact: XU You-Long E-mail:ylxu@mail.xjtu.edu.cn
  • Supported by:

    The project was supported by the National High-Tech Research and Development Program of China (863) (2007AA03Z249) and National Natural Science Foundation of China (20804030).

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摘要： 采用恒电流法制备了具有可快速充放电性能的对甲基苯磺酸根(TOS-)掺杂聚吡咯/功能化单壁碳纳米管(PPy-TOS/F-SWNTs)复合材料, 扫描电镜(SEM)结果表明该复合材料呈纳米棒状构成的多孔结构, 棒径约为70 nm; 比表面积(BET)测试分析表明该复合材料有着较高的比表面积(12.64 m2·g-1)和大的介孔孔隙率(20-40 nm). 循环伏安(CV)、电化学阻抗谱(EIS)和恒电流充放电(GC)电化学分析表明该材料具有优异的快速充放电性能, 在800 mV的电位窗和2.5 A·g-1(功率密度为2 kW·kg-1)的电流密度下该材料具有211 F·g-1的比容量(能量密度为18.7 Wh·kg-1), 而当充放电电流高达80 A·g-1(功率密度为60 kW·kg-1)时比容量仍可达141.8 F·g-1(能量密度为12.6 Wh·kg-1), 同时该材料还表现出优异的稳定性, 在10 A·g-1大电流下经历10000圈循环后容量仍保持95.2%.

关键词: 超级电容器, 电化学聚合, 聚吡咯, 单壁碳纳米管

Abstract: Fast charge-discharge composite materials of conducting polypyrrole and functionalized single-walled carbon nanotubes doped with p-toluenesulfonate (PPy-TOS/F-SWNTs) were prepared by galvanostatic electrochemical polymerization. Scanning Electron Microscope (SEM) images showed that the composite had a nano-rod structure with a diameter of about 70 nm. Nitrogen adsorption-desorption experinents were used to characterize the specific surface area (BET) (up to 12.64 m2·g-1) and pore sizes of the composite. Electrochemical properties of the composites were studied by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and galvanostatic charge-discharge (GC) measurements. The specific capacitance of this composite is about 211 F·g-1 (energy density: 18.7 Wh·kg-1) at a current density of 2.5 A·g-1, and 141.8 F·g-1 (energy density: 12.6 Wh·kg-1) at large current density of 80 A·g-1. The composite had excellent cyclability with a capacity retention of about 95.2% after 10000 cycles at a current density of 10 A·g-1. All these results indicate that this new composite material has a very rapidly charge-discharge ability

Key words: Supercapacitor, Electropolymerization, Polypyrrole, SWNTs