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时间:2019-03-14
《04 The application of EQCM to the study of the electrochemical behavior of propylene carbonate solutions.pdf》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、JOUANALOF"ELSEVIERJournalofElectroanalyticalChemistry393(1995)43-53TheapplicationofEQCMtothestudyoftheelectrochemicalbehaviorofpropylenecarbonatesolutionsD.Aurbach*,A.ZabanDepartmentofChemistry,Bar-llanUniversity,RamatGan52900,IsraelReceived18January1995;inrevisedform9March1995AbstractThee
2、lectrochemicalbehaviorofgoldelectrodesinpropylenecarbonate(PC)solutionswasinvestigatedusinganelectrochemicalquartzcrystalmicrobalance(EQCM).ThesolutionsstudiedincludeduncontaminatedLiAsF6andLiPF6solutions,andCO2andH20-containingLiAsF6solutions.Surfacefilmformationontheelectrodesinthesesolu
3、tionswasinvestigatedduringapotentialscanfromtheopen-circuitpotential(OCV)to0.5Vvs.Li/Li+andduringpotentialstepsfromtheOCVtovariouslowerpotentials.ThedataobtainedfromtheEQCMexperimentswereanalyzedwiththehelpoftheresultsofpreviousspectroelectrochemicalstudiesofseveralsurfacespeciesformedonno
4、blemetalelectrodesinthesesolutions.AnalysisoftheEQCMdataenabledthedefinitionofpotentialdomainsinwhichsaltanion,solventorcontaminantreductionaredominant.Usingthistechniqueitwasalsopossibletofollowthedissolutionprocessesofsurfacespeciesandhydrationofhygroscopicsurfacefilmcompoundsinwater-con
5、taminatedsolutions.Theresultsobtainedareingoodagreementwithpreviousspectroelectrochemicalstudiesofthesesystems.Keywords:Surfacefilmformation;Electrochemicalquartzcrystalmicrobalance;Goldelectrodes;Propylenecarbonatesolutions1.Introductionisitsshearmodulus(2.947×10Hgcm-1s-2).Onthebasisofthi
6、slinearbehavioritispossibletodeterminetheInrecentyearsEQCMhasbeenwidelyusedforthemassaccumulationpermoleofelectronstransferred(mpe)studyofelectrochemicalsystems,andseveralcomprehen-ofthespeciesdepositedontheelectrodesinelectrochemi-sivereviewsoftheapplicationofthistechniquetoelectro-calpro
7、cessesfromthechargeinvolvedaccordingtothechemistryhavealreadyappearedintheliterature[1].Thefollowingformula:techniqueisbasedonthepiezoelectriceffectofathinquartzcrystalplacedbetweentwoelectrodes(depositedonmpe=(d~if~dQ)(F/Cy)(2)bothsides)whichinducesanalternat
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