Citation: ZHU Jian-Bo, XU You-Long, WANG Jie, WANG Jing-Ping. Electropolymerization and Characterization of Fast Charge-Discharge PPy/F-SWNTs Composite Materials[J]. Acta Physico-Chimica Sinica, ;2012, 28(02): 373-380. doi: 10.3866/PKU.WHXB201112021 shu

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

ZHU Jian-Bo ^1,2 ,
XU You-Long ^1,2, ,
WANG Jie ^1,2 ,
WANG Jing-Ping ^1,2

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 Date: 26 September 2011
Available Online: 2 December 2011
Fund Project: 国家高技术研究发展计划(863) (2007AA03Z249) (863) (2007AA03Z249)国家自然科学基金(20804030)资助项目 (20804030)

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
- Supercapacitor,
- Electropolymerization,
- Polypyrrole,
- SWNTs
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