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Journal of Materials Science

, Volume 49, Issue 19, pp 6830–6837 | Cite as

Synthesis and electrochemical performances of a novel two-dimensional nanocomposite: polyaniline-coated laponite nanosheets

  • Xingwei Li
  • Min Zhou
  • Hailing Xu
  • Gengchao Wang
  • Zhun Wang
Article

Abstract

A novel two-dimensional nanocomposite, polyaniline-coated laponite (polyaniline/laponite) nanosheets, has been prepared by in situ oxidative polymerization of aniline on the surface of laponite nanosheets. These sheets present a loosely stacked structure with the formation of a great number of pores, which it can provide a larger electrode/electrolyte contact surface area, shorten the path for ions transport in the active material, and alleviate the expansion and contraction of the electrode material during the charge/discharge processes, leading to an improved electrochemical performance. As an active material for supercapacitors, the specific charge/discharge capacitance of polyaniline/laponite nanosheets is 375 and 330 F g−1 (based on the total working electrode mass) at a current density of 0.5 A g−1, respectively, with a coulombic efficiency of 88 % which is higher than that of pure polyaniline (28 %). Moreover, polyaniline/laponite nanosheets also show a good rate capability with a growth of current density from 0.5 to 30 A g−1, a specific discharge capacitance of 266 F g−1 remained at 30 A g−1. This work suggests a strategy to improve the electrochemical performances of polyaniline.

Keywords

Polyaniline Electrochemical Performance Coulombic Efficiency Contact Surface Area High Theoretical Capacitance 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgements

The authors are grateful for the financial support from Shanghai Leading Academic Discipline Project (B502) and Shanghai Key Laboratory Project (08DZ2230500).

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Copyright information

© Springer Science+Business Media New York 2014

Authors and Affiliations

  • Xingwei Li
    • 1
  • Min Zhou
    • 1
  • Hailing Xu
    • 1
  • Gengchao Wang
    • 1
  • Zhun Wang
    • 1
  1. 1.Shanghai Key Laboratory of Advanced Polymeric Materials, Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and EngineeringEast China University of Science and TechnologyShanghaiPeople’s Republic of China

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