Nano Research

, Volume 7, Issue 2, pp 209–218 | Cite as

Carbon nanotube-polypyrrole core-shell sponge and its application as highly compressible supercapacitor electrode

  • Peixu Li
  • Enzheng Shi
  • Yanbing Yang
  • Yuanyuan Shang
  • Qingyu Peng
  • Shiting Wu
  • Jinquan Wei
  • Kunlin Wang
  • Hongwei Zhu
  • Quan Yuan
  • Anyuan Cao
  • Dehai Wu
Research Article

Abstract

A carbon nanotube (CNT) sponge contains a three-dimensional conductive nanotube network, and can be used as a porous electrode for various energy devices. We present here a rational strategy to fabricate a unique CNT@polypyrrole (PPy) core-shell sponge, and demonstrate its application as a highly compressible supercapacitor electrode with high performance. A PPy layer with optimal thickness was coated uniformly on individual CNTs and inter-CNT contact points by electrochemical deposition and crosslinking of pyrrole monomers, resulting in a core-shell configuration. The PPy coating significantly improves specific capacitance of the CNT sponge to above 300 F/g, and simultaneously reinforces the porous structure to achieve better strength and fully elastic structural recovery after compression. The CNT@PPy sponge can sustain 1,000 compression cycles at a strain of 50% while maintaining a stable capacitance (> 90% of initial value). Our CNT@PPy core-shell sponges with a highly porous network structure may serve as compressible, robust electrodes for supercapacitors and many other energy devices.

Keywords

carbon nanotube sponge polypyrrole core-shell configuration compressible electrode supercapacitor 

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Supplementary material

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Copyright information

© Tsinghua University Press and Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  • Peixu Li
    • 1
  • Enzheng Shi
    • 2
  • Yanbing Yang
    • 3
  • Yuanyuan Shang
    • 2
  • Qingyu Peng
    • 2
  • Shiting Wu
    • 2
  • Jinquan Wei
    • 4
  • Kunlin Wang
    • 4
  • Hongwei Zhu
    • 4
  • Quan Yuan
    • 3
  • Anyuan Cao
    • 2
  • Dehai Wu
    • 1
  1. 1.Department of Mechanical EngineeringTsinghua UniversityBeijingChina
  2. 2.Department of Materials Science and Engineering, College of EngineeringPeking UniversityBeijingChina
  3. 3.Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular SciencesWuhan UniversityWuhanChina
  4. 4.Key Laboratory for Advanced Materials Processing Technology and School of Materials Science and EngineeringTsinghua UniversityBeijingChina

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