fabrication_and_electrochemical_properties_of_carbon_nanotube_array_electrode_for_supercapacitors

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1、ElectrochimicaActa49(2004)41574161FabricationandelectrochemicalpropertiesofcarbonnanotubearrayelectrodeforsupercapacitorsQiao-LingChen,Kuan-HongXue∗,WeiShen,Fei-FeiTao,Shou-YinYin,WenXuChemistryDepartment,NanjingNormalUniversity,122NingHaiRoadNanjing210097,ChinaReceived23February2004;receivedinrevi

2、sedform25March2004;accepted12April2004Availableonline4June2004AbstractThemultiwalledcarbonnanotube(MWNT)arraywasfabricatedbychemicalvapordeposition(CVD)inthetemplateofporousaluminafromthecarbonaceoussourceofC2H2inthepresenceofacatalystofferricmetals.Toutilizetheexternalsurfaceotherthantheinnersurfa

3、ceofthecarbonnanotubes,1mol/LsulfuricacidwasappliedtoremoveoffthemostpartofAAOtemplateonthecarbonnanotubeelectrode.Theelectrochemicalperformancesofthecarbonnanotubearrayelectrodewereinvestigatedbyuseofthecyclicvoltammetry,galvanostaticcharge/dischargeandacimpedancemethodsforitsapplicationinsupercap

4、acitors.Thespecificcapacitanceof365F/goftheelectrodewasachievedwiththedischargecurrentdensityof210mA/ginthesolutionof1mol/LH2SO4.Inaddition,thecarbonnanotubearrayelectrodewasfoundtohavelowequivalentseriesresistance(ESR)andgoodcyclingstability.©2004ElsevierLtd.Allrightsreserved.Keywords:Carbonnanotub

5、es;Orderedarray;Supercapacitors;Template;Anodicaluminumoxide1.Introductionmeans[26].Thispaperreportsourresearchontheorderedmulti-walledcarbonnanotubearray(CNA)fabricatedintheInrecentyears,supercapacitors[1]haveattractedgreattemplateofanodicaluminumoxide(AAO)usedforsuper-interestofmanyscientistsbeca

6、useoftheirusageinpowercapacitors.sourcesforelectricvehicles,computersandotherelectricdevices,withmuchhigherpowerdensitythanbatteriesandmuchhigherenergydensitythanconventionaldielectricca-2.Experimentalpacitorsotherthantheadvantagesoflongdurabilityandnoneofpollution.Supercapacitorsareoftentermedasel

7、ec-2.1.Preparationofcarbonnanotubearrayelectrodestrochemicalcapacitorsandcanbeclassifiedintotwotypes:(1)doublelayercapacitorsbasedoncarbonmaterialsofhighThetemplateofporousanodicaluminumoxide(AAO)surfacearea