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ID:34369170
大小:322.89 KB
页数:5页
时间:2019-03-05
《孔结构对煤基活性炭电极材料电化学性能的影响》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
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
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