Electrochemical synthesis of highly corrugated graphene sheets for high performance supercapacitors
This source preferred by Amor Abdelkader
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Authors: Abdelkader, A.M.
Journal: Journal of Materials Chemistry A
© The Royal Society of Chemistry 2015. 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 m 2 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.