Quantum capacitance estimations of pyrrolic-rich graphene for supercapacitor electrodes
Document Type
Article
Publication Date
3-1-2018
Abstract
© 2002-2012 IEEE. Despite having remarkable surface area (2630 m2/g for graphene), the graphene-based supercapacitors are still unable to attain the necessary energy density due to poor accessibility of surface area and low quantum capacitance. In this paper, we demonstrate an effective way to improve the quantum capacitance of graphene through plane wave density functional theory calculations. We used pyrrolic-type nitrogen doping to demonstrate extremely high quantum capacitances for graphene. An impressive 486.32 μF/cm2 quantum capacitance has been observed at a pyrrolic concentration of 6.38%. Our calculations suggest that the quantum capacitance of graphene increases with the pyrrolic concentration. We have also investigated the impact of combinational pyrrolic defects on the quantum capacitance of graphene. We believe that the pyrrolic defects studied in this paper also help in improving the graphene surface area accessibility by the electrolytic ions.
Publication Title
IEEE Transactions on Nanotechnology
Recommended Citation
SanthiBhushan, B.,
Khan, M.,
Bohat, V.,
&
Srivastava, A.
(2018).
Quantum capacitance estimations of pyrrolic-rich graphene for supercapacitor electrodes.
IEEE Transactions on Nanotechnology,
17(2), 205-211.
http://doi.org/10.1109/TNANO.2017.2786715
Retrieved from: https://digitalcommons.mtu.edu/michigantech-p/11074