Nanoscale2

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

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 and Pedro M. F. J. Costa
Nanoscale, 8, 17782, (2016). DOI: 10.1039/c6nr04426c
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Amira Alazmi, Omar El Tall, Shahid Rasul, Mohamed N. Hedhili, Shashikant P. Patolea and Pedro M. F. J. Costa
Graphene, Drying; Effluent treatment; Specific surface area; Supercritical fluids
2016
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. © The Royal Society of Chemistry 2016.