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

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 s...

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Published inNanoscale Vol. 8; no. 41; pp. 17782 - 17787
Main Authors Alazmi, Amira, El Tall, Omar, Rasul, Shahid, Hedhili, Mohamed N., Patole, Shashikant P., Costa, Pedro M. F. J.
Format Journal Article
LanguageEnglish
Published England 2016
Subjects
Drying
Electrodes
Graphene
Impact analysis
Nanostructure
Optimization
Oxides
Specific surface
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Summary: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 m g ) and supercapacitance (441 F g ) for this class of materials have been achieved.
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ISSN:2040-3364
2040-3372
2040-3372
DOI:10.1039/C6NR04426C