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1、http://www.paper.edu.cnNonlinearConductiveMediaBasedModelingof1ElectrochemistrySystemTingZhou,KangWang,XingHuaXia*KeyLaboratoryofAnalyticalChemistryforLifeScience,DepartmentofChemistry,NanjingUniversity,Nanjing210093,ChinaAbstractInthisarticle,weforthefirsttimepresentanonline
2、arconductivemediabasedapproachformodelingofelectrochemistrysystemusingblackboxmethod.Thebulkofelectrolytesolutionandthemainbodyofsolidelectrodearemodeledtobenormalconductivemedia,whiletheinterfacebetweenthesolutionandtheelectrodeismodeledtobenonlinearconductivemedia,whichisch
3、aracterizedbyinconstantconductivity.Thisnovelelectrochemistrysystemmodelingapproachisverifiedbycomparisonofexperimentdata,andcontributestoabetterunderstandingthedistributionofelectricalpotentialandcurrent,especiallyincomplicatedelectrochemistrysystems.Keywords:Nonlinear,black
4、box,finiteelementmethod,electrochemistry1.IntroductionDigitalsimulationsofelectrochemistrycomealongwayfromitsbeginning,since1970s[1-4].However,theyallholdaconventionalpattern,whichisbasedontechniquessolvingdifferentialequationsofspeciestransportationcoupledwithTaflecurve[4-11
5、].Usually,thisisthedirectwaytoresearchelectrochemicalprocedure.Itis,however,verycomplicatedforitsmultiphysicsmodel.Universalandsimplemethodsarerequiredtomeetthefastdevelopmentoftheelectrochemicalsimulation.Inthisarticle,wepresentedanovelideathatwebypasssolvingthedifficultmass
6、transportationequationsandconsidertheprocessofelectrodereactionasablackbox.Byapplyingthismethod,wesurmounttheobstaclesofcomplicatedpropertiesofelectrode,andcanpaymoreattentiontothelawsofthewholesystem.2.IdeaformodelingWheninvestigatingacomplexobjectwithoutknowledgeorassumptio
7、nsaboutitsinternalmake-up,structureorparts,weoftenuseblackboxstrategy.Theadvantageofblackboxstrategyliesinitsomissionofthedetailthatwedonotcaremuchbyusingablackboxasasubstituteofthiscomplexobject.Inelectrochemicalsystem(ECS),weusuallypaymoreattentiontothespeciesandtheirquanti
8、ties,therefore,whenwedosimulationsonECS,masstransportationequationss