NDLI: Supercapacitor based on H<sup>+</sup> and Ni<sup>2+</sup> co-doped polyaniline–MWCNTs nanocomposite: synthesis and electrochemical characterization

Content Provider	Royal Society of Chemistry (RSC)
Author	Giri, Soumen Ghosh, Debasis Mandal, Avinandan Das, Chapal Kumar
Copyright Year	2013
Abstract	In the search for promising electrode materials for supercomputer applications, we have synthesized a Ni2+ doped polyaniline, and a nanocomposite based on multiwalled carbon nanotubes (MWCNTs) and a Ni2+ doped polyaniline (PANI) in a HCl medium by an in situ oxidative polymerization. In the HCl medium and in the presence of Ni2+, PANI becomes co-doped with both H+ and Ni2+. The as synthesized materials were characterized by FTIR and Raman spectroscopy and an XRD study. Field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM) analyses confirmed the successful coating of the co-doped PANI on the MWCNT surface. The electrochemical characterizations were carried out by a three electrode system, with 1 M H2SO4 as the electrolyte. The PANI co-doped with H+ and Ni2+exhibited a specific capacitance of 311 F g−1 at a 0.5 A g−1 constant current, which was higher than that of the solely H+ doped PANI, which exhibited a specific capacitance of 265 F g−1 under the same conditions. The incorporation of MWCNTs to the co-doped PANI influenced the specific capacitance to increase to 781 F g−1 at the same constant current density, with a 92% retention of initial specific capacitance over 700 galvanostatic cycles.
Starting Page	11676
Ending Page	11685
Page Count	10
File Format	HTM / HTML PDF
ISSN	20462069
Volume Number	3
Issue Number	29
Journal	RSC Advances
DOI	10.1039/c3ra40955d
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Supercomputer Electrode Hydrogen Polymerization PANI Hydrogen chloride Polyaniline Raman spectroscopy Scanning electron microscope Carbon nanotube Transmission electron microscopy Electrolyte FTIR Electrochemistry X-ray scattering techniques Capacitance Raman Nanocomposite Electric current
Content Type	Text
Resource Type	Article
Subject	Chemistry Chemical Engineering

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