Synthesis of nitrogen-doped reduced graphene oxide-multiwalled carbon nanotube composite on nickel foam as electrode for high-performance supercapacitor

By Ban, Fook Yun; Jayabal, Subramaniam; Lim, Hong Ngee; Lee, Hing Wah; Huang, Nay Ming
Published in Ceramics International NULL 2017

Abstract

Abstract An electrode with nitrogen-doped reduced graphene oxide/multiwall carbon nanotubes deposited on nickel foam (N-rGO/MWCNTs/NF) was successfully prepared using a simple one-pot hydrothermal method. The N-rGO/MWCNTs/NF composite was fabricated as an electrode for supercapacitor application. The supercapacitive performance of the N-rGO/MWCNTs/NF electrode was studied using electrochemical impedance spectroscopy, cyclic voltammetry, and galvanostatic charge/discharge in a 6 M {KOH} electrolyte solution. The N-rGO/MWCNTs/NF electrode showed an enhanced capacitance compared to rGO/MWCNTs/NF, N-rGO/NF, N-MWCNTs/NF, and bare {NF} electrodes because of nitrogen atom doping and more accessibility of the electrolyte after the incorporation of {MWCNTs} between the graphene sheets. The N-rGO/MWCNTs/NF electrode showed a specific capacitance of 142.08 F g?1 at a current density of 1 A g?1 and cycling stability with 76.2% of its initial capacitance after 1000 charge/discharge cycles.

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