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1、中国科技论文在线http://www.paper.edu.cnTheeffectsofactivationconditionsonthesupercapacitive#performanceofporousactivatedbiocharLUQun,ZHANGYouwei,WANGXianyou,GAOJiao,LIUJia,CHENManfang,**5LIUMin,WANGXingyan(SchoolofChemistry,XiangtanUniversity,Xiangtan411105,China)Abstract:Theporouscarbonsde
2、rivedfromnaturallyabundantbambooshootshellfortheapplicationofsupercapacitorarefurtheractivatedbychemicalactivationwithZnCl2,H3PO4andK2CO3.Theinfluencesofactivationconditionontheporestructureandphysicochemicalpropertiesofthe10as-preparedporouscarbonsamplesareinvestigatedbyscanningele
3、ctronmicroscopy(SEM),transmissionelectronmicroscope(TEM),nitrogenadsorption-desorptionisotherm,cyclicvoltammogram(CV),galvanostaticcharge-discharge(GCD)test,electrochemicalimpedancespectroscopy(EIS)andcyclelifemeasurement.Theresultsshowthattheporousactivatedcarbonpreparedat1:1weight
4、ratioofK2CO3tobambooshootshellexhibitsaspecificsurfaceareaof1800-115m2gwiththeaverageporesizeof3.35nm(AC-K2CO3-900).Inaddition,theAC-K2CO3-900shows-1-1ahighspecificcapacitanceof287Fgatthecurrentdensityof1Ag.Moreover,theAC-K2CO3-900supercapacitorholdshighcapacitanceretentionof95.80%e
5、venafter10000cycles,indicatingitspotentialprospectfortheapplicationofhigh-performancesupercapacitors.Keywords:Bambooshootshell;Porouscarbon;Activationconditions;Activatedcarbon;20Supercapacitor0IntroductionTheincreasingenergyshortageandconcomitantenvironmentalpressureforceustodevelo
6、p[1]sustainableandrenewableenergyconversionsandelectricalenergystoragesystems.Among25theenergyconversionandstoragesystems,supercapacitorsorelectrochemicalcapacitorsareoneoftheworthiestchoices.Theyareanewkindofenergystoragesystemthatcancombinetheadvantagesofdielectriccapacitorsandrec
7、hargeablebatteriestoachievehighpowerdensity,long[2,3]cyclelife,fastcharge-dischargerateandoperationalsafety.Duetotheirexcellentproperties,supercapacitorshavealreadyacquiredgreatattentionofindustryandacademiainrecentyears.30Thus,theyhavealreadybeenwidelyappliedinmanyfields,suchas,ren
8、ewableenergypower[4
