Show simple item record

dc.contributor.advisorAlshareef, Husam N.
dc.contributor.authorBai, Yaocai
dc.date.accessioned2013-03-16T07:51:33Z
dc.date.available2014-12-31T00:00:00Z
dc.date.issued2012-06
dc.identifier.citationBai, Y. (2012). Preparation of Reduced Graphene Oxides as Electrode Materials for Supercapacitors. KAUST Research Repository. https://doi.org/10.25781/KAUST-2Y9G3
dc.identifier.doi10.25781/KAUST-2Y9G3
dc.identifier.urihttp://hdl.handle.net/10754/273093
dc.description.abstractReduced graphene oxide as outstanding candidate electrode material for supercapacitor has been investigated. This thesis includes two topics. One is that three kinds of reduced graphene oxides were prepared by hydrothermal reduction under different pH conditions. The pH values were found to have great influence on the reduction of graphene oxides. Acidic and neutral media yielded reduced graphene oxides with more oxygen-functional groups, lower specific surface areas but broader pore size distributions than those in basic medium. Variations induced by the pH changes resulted in great differences in the supercapacitor performance. The graphene produced in the basic solution presented mainly electric double layer behavior with specific capacitance of 185 F/g, while the other two showed additional pseudocapacitance behavior with specific capacitance of 225 F/g (acidic) and 230 F/g (neutral), all at a constant current density of 1A/g. The other one is that different reduced graphene oxides were prepared via solution based hydrazine reduction, low temperature thermal reduction, and hydrothermal reduction. The as- prepared samples were then investigated by UV-vis spectroscopy, X-ray diffraction, Raman spectroscopy, and Scanning electron microscope. The supercapacitor performances were also studied and the hydrothermally reduced graphene oxide exhibited the highest specific capacitance.
dc.language.isoen
dc.subjectSupercapacitor
dc.subjectHydrothermal
dc.subjectSpecific Capacitance
dc.subjectFunctionalization
dc.subjectGraphene
dc.subjectReduced graphene oxide
dc.titlePreparation of Reduced Graphene Oxides as Electrode Materials for Supercapacitors
dc.typeThesis
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.rights.embargodate2014-12-31
thesis.degree.grantorKing Abdullah University of Science and Technology
dc.contributor.committeememberAl-Kassab, Talaat
dc.contributor.committeememberBakr, Osman
thesis.degree.disciplineMaterials Science and Engineering
thesis.degree.nameMaster of Science
dc.rights.accessrightsAt the time of archiving, the student author of this thesis opted to temporarily restrict access to it. The full text of this thesis became available to the public after the expiration of the embargo on 2014-12-31.
refterms.dateFOA2014-12-31T00:00:00Z


Files in this item

Thumbnail
Name:
Yaocai, BaiThesis.pdf
Size:
1.801Mb
Format:
PDF

This item appears in the following Collection(s)

Show simple item record