2026-04-17T03:21:50Zhttps://recercat.cat/oai/request

oai:recercat.cat:2072/4562712024-11-18T01:39:28Zcom_2072_98col_2072_378192

00925njm 22002777a 4500 dc Wolfart, Franciele author Dubal, Deepak P. author Vidotti, Marcio author Gómez-Romero, Pedro author 2016 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. Charge/discharge cycle Core shell nano structures Electrochemical performance Electrochemical series Good capacity retentions High energy densities Nano-structured electrodes Threedimensional (3-d) Hybrid core-shell nanostructured electrodes made of polypyrrole nanotubes coated with Ni(OH)2 nanoflakes for high energy-density supercapacitors