Acta Phys. -Chim. Sin. ›› 2012, Vol. 28 ›› Issue (03): 609-614.doi: 10.3866/PKU.WHXB201201162

• ELECTROCHEMISTRY AND NEW ENERGY • Previous Articles     Next Articles

Carbon Nanotube/Polyaniline/Graphene Composite Paper and Its Electrochemical Capacitance Behaviors

JIN Yu1,2, CHEN Hong-Yuan2,3, CHEN Ming-Hai2, LIU Ning1, LI Qing-Wen2   

  1. 1. School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, P. R. China;
    2. Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences, Suzhou 215123, Jiangsu Province, P. R. China;
    3. Graduate University of Chinese Academy of Sciences, Beijing 100049, P. R. China
  • Received:2011-10-09 Revised:2011-12-28 Published:2012-02-23
  • Contact: CHEN Ming-Hai, LIU Ning;
  • Supported by:

    The project was supported by the Science and Technology Project of Suzhou, China (SYG201018) and Production and Research Collaborative Innovation Project of Jiangsu Province, China (BY2011178).

Abstract: Flexible carbon nanotube/polyaniline/graphene (CNT/PANI/GR) composite papers were prepared by electrochemical polymerization of PANI on cyclic voltammetry electrochemical oxidized CNT (CV-CNT) papers and the successive adsorption of GR. CNT, PANI, and GR provided a flexible conducting network skeleton, faradaic pseudocapacitive material, and surface conductivity modification properties, respectively. The composite papers exhibited a sandwich structure with an outer layer of GR and an inner layer composite network of CV-CNT/PANI, taking full advantage of the superior properties of the three components. The structure and morphology were characterized by field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), and Raman spectroscopy. The chemical capacitance characteristics were studied thoroughly. It was shown that PANI nanowhiskers wrapped around the CV-CNT surface evenly. The composite paper exhibited enhanced capacitance and high current charge/discharge characteristics as a supercapacitor electrode. The specific capacitance level could reach 415 F·g-1 at a current density of 0.5 A·g-1 and maintain a level of 106 F·g-1 at the higher current density of 20 A·g-1. In the protection of GR, the composite maintained a higher capacitance than CV-CNT/PANI after 1000 cycles, suggesting that the CV-CNT/PANI/GR composite would be an ideal flexible electrode material for a supercapacitor.

Key words: Carbon nanotube, Polyaniline, Graphene, Electrochemical polymerization, Capacitance


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