Issue 16, 2015

Electrochemical synthesis of highly corrugated graphene sheets for high performance supercapacitors

Abstract

Highly corrugated graphene sheets with low susceptibility to re-stacking were prepared by electrochemical reduction of graphene oxide (GO) in a molten salt bath. Oxygen functional groups were removed by depositing the reducing agent on a GO assembled cathode and also by direct electro-deoxygenation without generating reducing agents. The produced graphene derivative had electrical conductivity as high as 2300 S m−1, and a specific surface area of 565 m2 g−1 making it ideal as a supercapacitor with maximum specific capacitance of 255 F g−1 in 6 M KOH aqueous solution without the need for doping the graphene sheets. Further, the supercapacitor showed excellent cycling stability, retaining 95% of its initial capacitance after 5000 cycles of charge/discharge. Therefore, this material presents great promise for future design and large-scale production of affordable and high performance graphene electrodes for portable energy storage devices.

Graphical abstract: Electrochemical synthesis of highly corrugated graphene sheets for high performance supercapacitors

Supplementary files

Article information

Article type
Paper
Submitted
22 Janv. 2015
Accepted
13 Marts 2015
First published
13 Marts 2015

J. Mater. Chem. A, 2015,3, 8519-8525

Author version available

Electrochemical synthesis of highly corrugated graphene sheets for high performance supercapacitors

A. M. Abdelkader, J. Mater. Chem. A, 2015, 3, 8519 DOI: 10.1039/C5TA00545K

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