Synthetic approach from polypyrrole nanotubes to nitrogen doped pyrolyzed carbon nanotubes for asymmetric supercapacitors
Dubal, Deepak P. (Institut Català de Nanociència i Nanotecnologia)
Chodankar, Nilesh R. (Shivaji University. Department of Physics)
Cabán Huertas, Zahilia (Institut Català de Nanociència i Nanotecnologia)
Wolfart, Franciele (Universidade Federal do Paraná. Departamento de Química)
Vidotti, Marcio (Universidade Federal do Paraná. Departamento de Química)
Holze, Rudolf (Technische Universität Chemnitz. Institut für Chemie)
Lokhande, Chandrakant D. (Shivaji University. Department of Physics)
Gómez-Romero, Pedro 1959- (Institut Català de Nanociència i Nanotecnologia)

Date:	2016
Abstract:	Pseudocapacitive materials are highly capable to achieve high energy density integrated with high power electrostatic capacitive materials. However, finding a suitable electrostatic capacitive material to integrate with pseudocapacitive material in order to achieve high energy density with good rate capability is still a challenge. Herein, we are providing a novel synthetic approach starting from the synthesis of polypyrrole nanotubes (PPy-NTs) and ending up at the carbonization of PPy-NTs to obtain N-doped carbon nanotubes (N-CNTs). With highly porous nature of PPy-NTs and great graphitic texture with copious heteroatom functionalities, N-CNTs significantly promoted the faradic pseudo-capacitors, demonstrating high single-electrode capacitance over 332 F/g and 228 F/g in 1 M HSO aqueous solution. Further, a novel asymmetric supercapacitor with PPy-NTs as positive and N-CNTs as negative electrode has been fabricated. This PPy-NTs//N-CNTs cell effectively provides high operation voltage (1. 4 V) and hence high energy density over 28. 95 W h/kg (0. 41 mW h/cm) with a high power density of 7. 75 kW/kg (113 mW/cm) and cyclic stability of 89. 98% after 2000 cycles.
Grants:	Ministerio de Economía y Competitividad SEV-2013-0295
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades.
Language:	Anglès
Document:	Article ; recerca ; Versió sotmesa a revisió
Subject:	Asymmetric supercapacitor ; Capacitive materials ; High energy densities ; High operation voltage ; High power density ; Negative electrode ; Polypyrrole nanotubes ; Pseudo-capacitive materials
Published in:	Journal of power sources, Vol. 308 (March 2016) , p. 158-165, ISSN 0378-7753

DOI: 10.1016/j.jpowsour.2016.01.074

Preprint 31 p, 1.7 MB

The record appears in these collections:
Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > Catalan Institute of Nanoscience and Nanotechnology (ICN2)
Articles > Research articles
Articles > Published articles