Synthesis and characterization of graphene hollow spheres

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1、JournalofMaterialsChemistryAViewArticleOnlinePAPERViewJournal

2、ViewIssueSynthesisandcharacterizationofgraphenehollowspheresforapplicationinsupercapacitors†Citethis:J.Mater.Chem.A,2013,1,15423ababababaaQingguoShao,JieTang,*YuexianLin,FeifeiZhang,JinshiYuan,HanZhang,acNorioShinyaandLu-ChangQ

3、inWehavesuccessfullyassembledgraphenenanosheetsintosphericalshellsusingpolystyrenespheresasReceived18thJuly2013templates.Comparedwithstackedplanargraphene,theas-preparedgraphenesphericalshellshaveAccepted12thOctober2013morefreespaceinbetweenthespheres,whichresultsinalargeraccessiblesurfac

4、eareaforadsorptionDOI:10.1039/c3ta12789cofelectrolyteionsinsupercapacitors.Electrochemicaltestsshowthatthegraphenehollowspheres
1www.rsc.org/MaterialsAexhibitahighspecificcapacitanceof273Fgandexcellentelectrochemicalstability.Introductionwehavealsoexploredtheuseofsingle-walledcarbonnanotub

5、esasspacerstoreduceagglomerationofgraphenesheetsandDuetoitsexceptionalphysical,chemical,andmechanicalfoundthattheelectrochemicalpropertiesofthecompositeproperties,graphene,aone-atom-thicktwo-dimensionalcarbongrapheneelectrodeswereindeedmuchimproved.13material,hasbecomeapromisingcandidatef

6、orabroadrangeInrecentyears,muchattentionhasbeenpaidtoassembleofapplications.Grapheneofferslargespecicsurfacearea,highgraphenenanosheetsintovarioustailoredmacroscopicgra-conductivity,excellentmechanicalexibility,andoutstandingphenestructures,suchasporouslms,owers,networks,andchemicalsta

7、bility.Thesecharacteristicsmakegrapheneanhydrogels,toimprovetheirelectrochemicalperformance.14–17attractiveelectrodematerialforsupercapacitors.1–5Stolleretal.Morerecently,graphenecapsuleshavebeensynthesizedbyW/Orstreportedthatchemicallymodiedgraphenecandeliveraemulsionandcapillarymoldin

8、gandtheas-preparedgraphene
1
1speciccapacitanceof135Fgand99Fginaqueousandcapsulesshowedattractivecharacteristicsforoilabsorption.18–20organicelectrolytes,respectively.6However,thegrapheneInthepresentstudy,wehavesuccessfullyassembledgra-sheetstendtorestackduetothest