A process to enhance the specific surface area and capacitance of hydrothermally reduced graphene oxide

Amira Alazmi, Omar El Tall, Shahid Rasul, Mohamed N. Hedhili, Shashikant P. Patole, Pedro M.F.J. Costa*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

47 Citations (Scopus)

Abstract

The impact of post-synthesis processing in reduced graphene oxide materials for supercapacitor electrodes has been analyzed. A comparative study of vacuum, freeze and critical point drying was carried out for hydrothermally reduced graphene oxide demonstrating that the optimization of the specific surface area and preservation of the porous network are critical to maximize its supercapacitance performance. As described below, using a supercritical fluid as the drying medium, unprecedented values of the specific surface area (364 m2 g-1) and supercapacitance (441 F g-1) for this class of materials have been achieved.

Original languageEnglish
Pages (from-to)17782-17787
Number of pages6
JournalNanoscale
Volume8
Issue number41
Early online date26 Aug 2016
DOIs
Publication statusPublished - 7 Nov 2016
Externally publishedYes

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