Abstract
Polyaniline/Multiwalled carbon nanotubes (PANI/MWCNTs) nanocomposite was prepared via liquid-liquid interfacial polymerization method. The morphology studies of the nanocomposite using SEM and TEM techniques confirmed the presence of PANI as aggregates along with MWCNTs and X-ray diffraction studies indicated the presence of graphitic planes of MWCNTs along with PANI in semi-crystalline emeraldine salt form. The PANI/MWCNTs nanocomposite electrode exhibited specific capacitance (Cs) of 1551 F/g at a scan rate of 2 mV/s in aqueous 1 M H2SO4 in a potential window of 0–1.2 V. The material exhibited good cycle life with 95% capacitance retention in a life cycle test conducted at 5 A/g for 1000 cycles. Further, an asymmetric supercapacitor device (ASD) was fabricated using PANI/MWCNTs as positive and activated carbon as negative electrodes in aqueous 1 M H2SO4. The ASD exhibited a Cs of 142 F/g at a scan rate of 5 mV/s in a wide potential range of 0–1.6 V. The device offered high energy and power densities of 29 Wh/Kg and 7.3 kW/Kg respectively and also demonstrated an excellent cyclic stability by retaining 97% of its initial capacitance after 5000 cycles at high current density of 20 A/g.
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Schematic representation of design of asymmetric supercapacitor device, its cycle performance and Ragone plot
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Acknowledgements
The authors thank NRB- Naval Research Board for the financial support given for this research work. Project Number: NRB-290/MAT/12-13. Authors thank Dr. Krishna Venkatesh, Director, Centre for Incubation, Innovation, Research and Consultancy, Jyothy Institute of Technology Dr. M. Krishna, Director, CMRTU, RVCE for their constant support in encouraging this research work.
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Highlights
• PANI & PANI/MWCNTs was prepared by simple, easy interfacial Polymerization method.
• PANI/MWCNTs exhibited superior supercapacitance performance than PANI.
• Fabricated ASD offered an ED of 29 Wh/kg & 97% Cs retention for 5000 cycles.
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Prasanna, B.P., Avadhani, D.N., Chaitra, K. et al. Synthesis of polyaniline/MWCNTs by interfacial polymerization for superior hybrid supercapacitance performance. J Polym Res 25, 123 (2018). https://doi.org/10.1007/s10965-018-1526-2
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DOI: https://doi.org/10.1007/s10965-018-1526-2