Title:
|
Synthetic approach from polypyrrole nanotubes to nitrogen doped pyrolyzed carbon nanotubes for asymmetric supercapacitors
|
Author:
|
Dubal, Deepak P.; Chodankar, Nilesh R.; Cabán Huertas, Zahilia; Wolfart, Franciele; Vidotti, Marcio; Holze, Rudolf; Lokhande, Chandrakant D.; Gómez-Romero, Pedro
|
Abstract:
|
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 and 228 F/g in 1 M HSO 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) with a high power density of 7.75 kW/kg (113 mW/cm) and cyclic stability of 89.98% after 2000 cycles. |
Subject(s):
|
-Asymmetric supercapacitor -Capacitive materials -High energy densities -High operation voltage -High power density -Negative electrode -Polypyrrole nanotubes -Pseudo-capacitive materials |
Rights:
|
open access
Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades.
https://creativecommons.org/licenses/by-nc-nd/4.0/ |
Document type:
|
Article |
Published by:
|
|
Share:
|
|
Uri:
|
https://ddd.uab.cat/record/225305
|