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Hybrid core-shell nanostructured electrodes made of polypyrrole nanotubes coated with Ni(OH)2 nanoflakes for high energy-density supercapacitors Wolfart, Franciele Dubal, Deepak P. Vidotti, Marcio Gómez-Romero, Pedro Charge/discharge cycle Core shell nano structures Electrochemical performance Electrochemical series Good capacity retentions High energy densities Nano-structured electrodes Threedimensional (3-d) 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. 2016 Article https://ddd.uab.cat/record/241000 urn:10.1039/c5ra23671a urn:oai:ddd.uab.cat:241000 urn:scopus_id:84957895374 urn:articleid:20462069v6n18p15062 urn:icn2uab:4130712 eng Ministerio de Economía y Competitividad MAT2012-39199-C02-01 Ministerio de Economía y Competitividad SEV-2013-0295 RSC advances ; Vol. 6, issue 18 (2016), p. 15062-15070 open access Aquest material està protegit per drets d'autor i/o drets afins. Podeu utilitzar aquest material en funció del que permet la legislació de drets d'autor i drets afins d'aplicació al vostre cas. Per a d'altres usos heu d'obtenir permís del(s) titular(s) de drets. https://rightsstatements.org/vocab/InC/1.0/ application/pdf