Impact of polypyrrole incorporation on nickel oxide@multi walled carbon nanotube composite for application in supercapacitors

Hemraj M. Yadav, Sivalingam Ramesh, K. Ashok Kumar, Surendra Shinde, Sanjay Sandhu, Arumugam Sivasamy, Nabeen K. Shrestha, Heung Soo Kim, Hyun Seok Kim, Chinna Bathula

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Abstract

In this article we report the synthesis of polypyrrole incorporated nickel oxide multi walled carbon nanotube (NiO@NMWCNT/PPy) composites by thermal reduction protocol for supercapacitor applications. The structural and morphological properties of the composites were confirmed by the aid of X-ray diffraction (XRD), Field-emission scanning electron microscope (FE-SEM) with energy-dispersive X-ray spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS) and Field-emission transmission electron microscopy (FE-TEM) analysis indicating the hexagonal crystal structure of NiO decorated on NMWCNT/Ppy. The electrochemical characteristics of the NiO@MWCNT/PPy composite were analyzed in the presence of 2 M KOH as an electrolyte. The NiO@NMWCNT/PPy nanostructured composite produced a plenty of active sites for ion migration reactions that facilitate the energy storage mechanism. As a proof of concept demonstration, the NiO@NMWCNT/PPy composite was explored as an electrode materials in supercapacitor and exhibited specific capacitance of 395 F g−1 and cyclic stability up to 5000 cycles at 0.5 A g−1. Enhanced performance of composite is attributed to the incorporation of polypyrrole in NiO@NMWCNT. The improved capacitance and cyclic stability demonstrated by the composite indicates the NiO@NMWCNT/PPy to be a promising candidate for supercapacitor applications.

Original languageEnglish
Article number106727
JournalPolymer Testing
Volume89
DOIs
StatePublished - Sep 2020

Keywords

  • Electrochemical performance
  • Nanocomposite
  • Nickel oxide
  • Polymer
  • Thermal reduction method

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