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Emulsion polymerization method for polyaniline-multiwalled carbon nanotube nanocomposites as supercapacitor materials

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Abstract

Nanocomposites consisting of the conducting polymer, polyaniline (PANI), and multiwalled carbon nanotubes (MWNT) were prepared by in situ emulsion polymerization of aniline monomer on the surface of MWNT, using sodium dodecyl sulfate as an emulsifier and by varying the wt% of the MWNT. The morphology, composition, and thermal stability of the PANI-MWNT nanocomposites and pure PANI were characterized by Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), thermogravimetric analysis (TGA), and field emission electron microscopy (FE-SEM). The PANI-MWNT nanocomposites were found to be crystalline in nature, with the PANI corals grown uniformly on the MWNT. Symmetric supercapacitors were constructed using the PANI-MWNT nanocomposites and pure PANI. Electrochemical analysis of the nanocomposites was performed using cyclic voltammetry and the galvanostatic charge-discharge method. The cyclic voltammetry analysis showed a synergistic increase in the specific capacitance of the PANI-MWNT nanocomposites. The unique structure of the PANI-MWNT nanocomposites led to a high specific capacitance of 240 F g−1 at a current density of 4.0 A g−1, with good rate performance, and 93 % retention of specific capacitance after 5000 CD cycles, indicating their potential as an electrode material for supercapacitors.

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Acknowledgments

Encouragement for this research work by the Council of Scientific and Industrial Research under the Solar Mission Project is gratefully acknowledged. Author SBS thanks UGC, New Delhi, for research fellowship.

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Authors and Affiliations

  1. Organic Nanomaterials Laboratory, Department of Chemistry, Hannam University, 461-6, Daejeon, 305-811, Republic of Korea

    Bal Sydulu Singu & Kuk Ro Yoon

  2. Department of Chemistry, Osmania University, Hyderabad, 500 007, India

    Bal Sydulu Singu

  3. Polymers and Functional Materials Division, CSIR-Indian Institute of Chemical Technology, Hyderabad, 500 007, India

    Palaniappan Srinivasan

Authors
  1. Bal Sydulu Singu
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  2. Palaniappan Srinivasan
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  3. Kuk Ro Yoon
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Correspondence to Bal Sydulu Singu.

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Sydulu Singu, B., Srinivasan, P. & Yoon, K.R. Emulsion polymerization method for polyaniline-multiwalled carbon nanotube nanocomposites as supercapacitor materials. J Solid State Electrochem 20, 3447–3457 (2016). https://doi.org/10.1007/s10008-016-3309-1

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  • DOI: https://doi.org/10.1007/s10008-016-3309-1

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