Hybrid core-shell nanostructured electrodes made of polypyrrole nanotubes coated with Ni(OH)2 nanoflakes for high energy-density supercapacitors
Wolfart, Franciele (Universidade Federal Do Paraná. Departamento de Química)
Dubal, Deepak P. (Institut Català de Nanociència i Nanotecnologia)
Vidotti, Marcio (Universidade Federal Do Paraná. Departamento de Química)
Gómez-Romero, Pedro 1959- (Institut Català de Nanociència i Nanotecnologia)

Date:	2016
Abstract:	This work describes the design of Ni(OH)@PPy-NTs core-shell nanostructures with potential application as an electrode material for supercapacitors. Initially, one dimensional (1D) polypyrrole nanotubes (PPy-NTs) were synthesized through a chemical oxidation mediated soft template-directed route using as the anion the azo dye methyl orange (MO). Subsequently, three dimensional (3D) Ni(OH) nanoflakes were grown onto PPy-NTs by a simple hydrothermal route. This exclusive Ni(OH)@PPy-NTs nano-architecture helps to improve the overall electrochemical performance of the electrode, due to the high surface area provided by 3D nanoflakes and excellent electronic/ionic conductivity of 1D nanotubes. The maximum specific capacitance obtained for Ni(OH)@PPy-NTs was 536 F g with good capacity retention after 1000 charge/discharge cycles. Last but not least, EIS technique showed a low electrochemical series resistance for Ni(OH)@PPy-NTs confirming their promise as a high-performance energy storage material.
Grants:	Ministerio de Economía y Competitividad MAT2012-39199-C02-01 Ministerio de Economía y Competitividad SEV-2013-0295
Rights:	Tots els drets reservats.
Language:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Subject:	Charge/discharge cycle ; Core shell nano structures ; Electrochemical performance ; Electrochemical series ; Good capacity retentions ; High energy densities ; Nano-structured electrodes ; Threedimensional (3-d)
Published in:	RSC advances, Vol. 6, issue 18 (2016) , p. 15062-15070, ISSN 2046-2069

DOI: 10.1039/c5ra23671a

Postprint 31 p, 2.9 MB

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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