Graphene/Ionic Liquid Binary Electrode Material for High Performance Supercapacitor

Author

Tamilarasan, P. ; Mishra, Ashish Kumar ; Ramaprabhu, Sundara

Author_Institution

Dept. of Phys., Indian Inst. of Technol. Madras (IITM), Chennai, India

fYear

2011

fDate

8-10 Dec. 2011

Firstpage

1

Lastpage

5

Abstract

Herein, we report, the use of hydrogen exfoliated graphene (HEG)/ionic liquid (l-Butyl-3-methylimidazolium terafluoroborate ([BMIMJBF4)) binary electrode material for high performance supercapacitor. HEG/[BMIM] BF4 nanocomposite was prepared and the electrochemical characterization of the electrode has been carried out by cyclic voltammetry and chronopotentiometry. The nanocomposite electrode shows a high specific capacitance (268 F/g at 5mV/s scan rate. Since the ionic liquid has large electrochemical window of 2 V even at atmospheric conditions than the aqueous electrolytes, high energy density of 66.9 Wh/kg at 5 A/g current density could be achieved.

Keywords

electrodes; electrolytes; graphene; supercapacitors; voltammetry (chemical analysis); aqueous electrolytes; chronopotentiometry; cyclic voltammetry; electrochemical characterization; electrochemical window; graphene/ionic liquid binary electrode material; high performance supercapacitor; hydrogen exfoliated graphene; nanocomposite electrode; Capacitance; Carbon; Carbon nanotubes; Electrodes; Liquids; Supercapacitors;

fLanguage

English

Publisher

ieee

Conference_Titel

Nanoscience, Technology and Societal Implications (NSTSI), 2011 International Conference on

Conference_Location

Bhubaneswar

Print_ISBN

978-1-4577-2035-2

Type

conf

DOI

10.1109/NSTSI.2011.6111793

Filename

6111793