Details

Autor(en) / Beteiligte

• Dubal, Deepak P.
• Chodankar, Nilesh R.
• Caban-Huertas, Zahilia
• Wolfart, Franciele
• Vidotti, Marcio
• Holze, Rudolf
• Lokhande, Chandrakant D.
• Gomez-Romero, Pedro

Titel

Synthetic approach from polypyrrole nanotubes to nitrogen doped pyrolyzed carbon nanotubes for asymmetric supercapacitors

Ist Teil von

• Journal of power sources, 2016-03, Vol.308, p.158-165

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2016

Link zum Volltext

Quelle

ScienceDirect

Beschreibungen/Notizen

• 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(PPy-NTs) and 228 F/g(N-CNTs) in 1 M H2SO4 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/cm3) with a high power density of 7.75 kW/kg (113 mW/cm3) and cyclic stability of 89.98% after 2000 cycles. •Synthesis of 1D PPy nanotubes.•Carbonization of PPy nanotubes to prepare N doped carbon nanotubes (N-CNTs).•Fabrication of asymmetric supercapacitor with PPy-NTs//N-CNTs.•High performance asymmetric device.