Hybrid core-shell nanostructured electrodes made of polypyrrole nanotubes coated with Ni(OH)(2) nanoflakes for high energy-density supercapacitors

作者：Wolfart Franciele; Dubal Deepak P; Vidotti Marcio; Gomez Romero Pedro

来源：RSC Advances, 2016, 6(18): 15062-15070.

DOI：10.1039/c5ra23671a

This work describes the design of Ni(OH)(2)@ PPy-NTs core-shell nanostructures with potential application as an electrode material for supercapacitors. Initially, one dimensional (1D) polypyrrole nanotubes (PPyNTs) 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)(2) nanoflakes were grown onto PPy-NTs by a simple hydrothermal route. This exclusive Ni(OH)(2)@ 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)(2)@ PPy-NTs was 536 F g(-1) with good capacity retention after 1000 charge/discharge cycles. Last but not least, EIS technique showed a low electrochemical series resistance for Ni(OH)(2)@ PPy-NTs confirming their promise as a high-performance energy storage material.

• 出版日期2016