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Electrochemical capacitance of the composite of poly (3,4-ethylenedioxythiophene) and functionalized single-walled carbon nanotubes

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Abstract

The homogenous coating of poly (3,4-ethylenedioxythiophene) (PEDOT) on carbon nanotubes was realized by using functionalization of single-walled carbon nanotubes (SWNTs) in this study. Consequently, the PEDOT/functionalized SWNTs (PEDOT/F-SWNTs) composites, with size of around 100nm, which is much smaller than that of PEDOT, were prepared by the electrochemical method. Its small granule increased the active/nonactive mass ratio and reduced the ions diffusion length. Therefore, its specific capacitance of the composite was up to 200F g−1, which was remarkably greater than that of PEDOT. Furthermore, the PEDOT/F-SWNTs composites had very rapid charge/discharge ability with specific capacitance of 180F g−1 at scanning rate of 200mV s−1 and 170F g−1 at frequency of 1Hz, which is an important practical advantage. In addition, such composite had a good cycling performance and a wide potential window.

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Acknowledgments

This work was financially supported by the National Natural Science Foundation of China (Grant no. 50473033) and the Specialized Research Fund for the Doctoral Program of Higher Education of China (Grant no. 20040698016).

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Authors and Affiliations

  1. Electronic Material Research Laboratory, Key Laboratory of the Ministry of Education, Xi’an Jiaotong University, Xi’an, 710049, People’s Republic of China

    Jie Wang, Youlong Xu, Xiaofei Sun, Xifei Li & Xianfeng Du

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  1. Jie Wang
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  2. Youlong Xu
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  3. Xiaofei Sun
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  4. Xifei Li
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  5. Xianfeng Du
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Correspondence to Jie Wang.

Additional information

Contribution to ICMAT 2007, Symposium K: Nanostructured and bulk materials for electrochemical power sources, July 1–6 2007, Singapore

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Wang, J., Xu, Y., Sun, X. et al. Electrochemical capacitance of the composite of poly (3,4-ethylenedioxythiophene) and functionalized single-walled carbon nanotubes. J Solid State Electrochem 12, 947–952 (2008). https://doi.org/10.1007/s10008-007-0439-5

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  • DOI: https://doi.org/10.1007/s10008-007-0439-5

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