Rational design of reduced graphene oxide for superior performance of supercapacitor electrodes

Handle URI:
http://hdl.handle.net/10754/621260
Title:
Rational design of reduced graphene oxide for superior performance of supercapacitor electrodes
Authors:
Rasul, Shahid ( 0000-0002-2543-0205 ) ; Alazmi, A.; Jaouen, K.; Hedhili, M.N.; Da Costa, Pedro M. F. J. ( 0000-0002-1993-6701 )
Abstract:
Strategies to synthesize reduced graphene oxide (rGO) abound but, in most studies, research teams select one particular oxidation-reduction method without providing a methodic reasoning for doing so. Herein, it is analyzed how diverse oxidation-reduction strategies commonly used can result in considerable performance differences of rGO for supercapacitor applications. Depending on the graphite oxidation method followed, the surface chemistry analysis of the products confirms that there is a marked disparity in the degree of oxidation and the nature of the oxygen functional groups present. Subsequent reduction of the oxidized graphite (using three different methods) showed that the maximum specific capacitance of rGOs produced from the classical Hummers' method was 128 F g−1 whereas an analogous material obtained from an improved Hummers' method reached ∼274 F g−1 (both via an hydrothermal reduction route). Besides showing that the improved oxidation method results in superior capacitance performance, explained by the higher number of structural defects allied to a surface chemistry where residual hydroxyl and epoxy functional groups predominate, this study highlights the need to rationalize the oxidation-reduction strategies followed when investigating applications of rGO materials.
KAUST Department:
Physical Sciences and Engineering (PSE) Division; Imaging and Characterization Core Lab
Citation:
Rasul S, Alazmi A, Jaouen K, Hedhili MN, Costa PMFJ (2017) Rational design of reduced graphene oxide for superior performance of supercapacitor electrodes. Carbon 111: 774–781. Available: http://dx.doi.org/10.1016/j.carbon.2016.10.066.
Publisher:
Elsevier BV
Journal:
Carbon
KAUST Grant Number:
BAS/1/1346-01-01
Issue Date:
24-Oct-2016
DOI:
10.1016/j.carbon.2016.10.066
Type:
Article
ISSN:
0008-6223
Sponsors:
The authors are thankful for the financial support from KAUST (BAS/1/1346-01-01). KJ thanks the VSRP-KAUST Program for an internship at KAUST.
Additional Links:
http://www.sciencedirect.com/science/article/pii/S0008622316309289
Appears in Collections:
Articles; Advanced Nanofabrication, Imaging and Characterization Core Lab; Physical Sciences and Engineering (PSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorRasul, Shahiden
dc.contributor.authorAlazmi, A.en
dc.contributor.authorJaouen, K.en
dc.contributor.authorHedhili, M.N.en
dc.contributor.authorDa Costa, Pedro M. F. J.en
dc.date.accessioned2016-10-31T07:37:30Z-
dc.date.available2016-10-31T07:37:30Z-
dc.date.issued2016-10-24en
dc.identifier.citationRasul S, Alazmi A, Jaouen K, Hedhili MN, Costa PMFJ (2017) Rational design of reduced graphene oxide for superior performance of supercapacitor electrodes. Carbon 111: 774–781. Available: http://dx.doi.org/10.1016/j.carbon.2016.10.066.en
dc.identifier.issn0008-6223en
dc.identifier.doi10.1016/j.carbon.2016.10.066en
dc.identifier.urihttp://hdl.handle.net/10754/621260-
dc.description.abstractStrategies to synthesize reduced graphene oxide (rGO) abound but, in most studies, research teams select one particular oxidation-reduction method without providing a methodic reasoning for doing so. Herein, it is analyzed how diverse oxidation-reduction strategies commonly used can result in considerable performance differences of rGO for supercapacitor applications. Depending on the graphite oxidation method followed, the surface chemistry analysis of the products confirms that there is a marked disparity in the degree of oxidation and the nature of the oxygen functional groups present. Subsequent reduction of the oxidized graphite (using three different methods) showed that the maximum specific capacitance of rGOs produced from the classical Hummers' method was 128 F g−1 whereas an analogous material obtained from an improved Hummers' method reached ∼274 F g−1 (both via an hydrothermal reduction route). Besides showing that the improved oxidation method results in superior capacitance performance, explained by the higher number of structural defects allied to a surface chemistry where residual hydroxyl and epoxy functional groups predominate, this study highlights the need to rationalize the oxidation-reduction strategies followed when investigating applications of rGO materials.en
dc.description.sponsorshipThe authors are thankful for the financial support from KAUST (BAS/1/1346-01-01). KJ thanks the VSRP-KAUST Program for an internship at KAUST.en
dc.publisherElsevier BVen
dc.relation.urlhttp://www.sciencedirect.com/science/article/pii/S0008622316309289en
dc.rights© 2016. This manuscript version is made available under the CC-BY-NC-ND 4.0 licenseen
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/en
dc.titleRational design of reduced graphene oxide for superior performance of supercapacitor electrodesen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentImaging and Characterization Core Laben
dc.identifier.journalCarbonen
dc.eprint.versionPost-printen
kaust.authorRasul, Shahiden
kaust.authorAlazmi, A.en
kaust.authorJaouen, K.en
kaust.authorHedhili, M.N.en
kaust.authorDa Costa, Pedro M. F. J.en
kaust.grant.numberBAS/1/1346-01-01en
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