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

被引:163
作者
Dubal, Deepak P. [1 ,2 ]
Chodankar, Nilesh R. [3 ]
Caban-Huertas, Zahilia [1 ,2 ]
Wolfart, Franciele [4 ]
Vidotti, Marcio [4 ]
Holze, Rudolf [5 ]
Lokhande, Chandrakant D. [3 ]
Gomez-Romero, Pedro [1 ,2 ]
机构
[1] CSIC, Catalan Inst Nanosci & Nanotechnol ICN2, Campus UAB, Barcelona 08193, Spain
[2] CSIC, Barcelona Inst Sci & Technol, Campus UAB, Barcelona 08193, Spain
[3] Shivaji Univ, Dept Phys, Thin Film Phys Lab, Kolhapur 416004, Maharashtra, India
[4] Univ Fed Parana, Dept Quim, Grp Pesquisa Macromol & Interfaces, CP 19081, BR-81531980 Curitiba, PR, Brazil
[5] Tech Univ Chemnitz, Inst Chem, AG Elektrochem, D-09107 Chemnitz, Germany
关键词
HYBRID ENERGY-STORAGE; REDUCED GRAPHENE OXIDE; HIGH-PERFORMANCE; ACTIVATED CARBON; NANOWIRES; COMPOSITE; ELECTRODES; NANOSHEETS; BATTERY; SPONGE;
D O I
10.1016/j.jpowsour.2016.01.074
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
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/cm(3)) with a high power density of 7.75 kW/kg (113 mW/cm(3)) and cyclic stability of 89.98% after 2000 cycles. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码:158 / 165
页数:8
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