孔结构对煤基活性炭电极材料电化学性能的影响

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1、万方数据第25卷第2期新型炭材料V01．25No．22010年4月NEWCARBONMATERIALSApr．2010ArticleID：1007-8827(2010)02-0129-05Effectofporestructureontheelectrochemicalperformanceofcoal．basedactivatedcarbonsinnon-aqueouselectrolyteZHANGChuan．xian91”，ZHANGRuil，XINGBao—lin2，CHENGGu01，XieYing—b0

2、1，QIAOWen—min91，ZHANLian91，LIANGXiao—yil，LINGLi—chen91(1．StateKeyLaboratoryofChemicalEngineering，EastChinaUniversityofScienceandTechnology，Shanghai200237，China；2．SchoolofMaterialsScienceandTechnology，HenanPolytechnicUniversity，Jiaozuo454000，China)Abstract：Anth

3、racitewasactivatedbyNaOHtopreparehigh—performanceactivatedcarbonsaselectrodesforelectricdouble-layercapacitors．neporousstructureandelectrochemicalcharacteristicsofthecarbonswereinvestigatedbyni—trogensorptionandelectrochemicalmethods．Theeffectofporestructureon

4、theelectrochemicalperformanceofthecar-bonsinalmoVL(C2H5)4NBF4／propylenecarbonate(PC)electrolytewasinvestigated．mas-preparedactivatedcar-bonsexhibitlargesurfaceareas(943-2479m2以)andhigll·specificcapacitances(57·167F／g)．nespecificcapacitancedependsnotonlyonthesu

5、rfacearea，butalsoontheporesizedistribution(PSD)ofthecarbon．Poreswithasizeof2-3nnlarecrucialfortheionstopenetrateinsidethemforthe(C2H5)4NBF4／PCelectrolyte．SpecificcapacitanceishigherandimpedanceislowerforthesamplewithawiderPSDduetothefactthatelectrolyteionscoul

6、deasilyenterthepores·Keywords：Activatedcarbon；Electricdouble—layercapacitors；Electrochemicalperformance；PorestructureCLcnumber：TQ424．1例911．15Documentcode：AlIntroductionElectricdouble．1ayercapacitors(EDLCs)arepromisinghighpowerenergysourcesformanydiffer-entappl

7、ications，wherehighpowerdensity，highcy-cleefficiencyandlongcyclelireareneeded【l-．5j．AmongvariousavailablecandidatematerialsforEDLCs。activatedcarbonsaremostlyinvestigated，owingtotheiradvantages，suchaslargespecificsur-facearea，goodelectricconductivity，excellentch

8、em—icalstabilityandrelativelylowpricet4-7J．Activatedcarbonscanbepreparedfromavarietyofstartingmaterials．Amongawiderangeofprecur-sors．anthraciteisinterestingfortheirabundance，lowcos