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1、ARTICLEINPRESSinternationaljournalofhydrogenenergyxxx(2009)1–6Availableatwww.sciencedirect.comjournalhomepage:www.elsevier.com/locate/heSDC–LiNacarbonatecompositeandnanocompositeelectrolytesa,b,acd,ZhiguoTang*,QizhaoLin,Bengt-ErikMellander,BinZhu**aDepartm
2、entofThermalScienceandEnergyEngineering,UniversityofScienceandTechnologyofChina,JinzhaiRoad,Hefei230026,ChinabSchoolofMechanicalandAutomobileEngineering,HefeiUniversityofTechnology,Hefei230009,ChinacDepartmentofAppliedPhysics,ChalmersUniversityofTechnology
3、,GothenburgS-41296,SwedendDepartmentofEnergyTechnology,RoyalInstituteofTechnology,StockholmS-10044,SwedenarticleinfoabstractArticlehistory:StructuralandA.C.impedanceanalyseswereconductedforvariousceria-basedcompositeReceived13April2009systems.Structuralstu
4、diesshowedthattheceriacarbonatecompositesaretwo-phaseAccepted5May2009materials,wherecarbonateswereoftenamorphous.TwophasesofceriaandcarbonatesAvailableonline-aremixedatdifferentparticlesizelevelsdependingonthepreparationtechniques,especially,employingtheNA
5、NOCOFC(nanocompositesforadvancedfuelcelltechnology)Keywords:approachtoprepareceriaLiNaCO3nanocomposites.GeneralobservationsfromstructuralIntermediateandlowtemperatureanalysesarethatdifferentpreparationtechniquesresultedintwo-phasecompositesolidoxidefuelcel
6、lparticlesindifferentparticlesizesvaryingfrommicrometerleveltonano-levelaccom-Samariumdopedceria(SDC)panyingalsodifferenthomogeneity.GeneralobservationsfromimpedanceanalysesareCeria-basedcompositeelectrolytesthatforthenanocomposites(particlesizeatnano-scal
7、e)morecomplexgrainboundaryNanocompositesinterfaceeffectsareobservedcomparedtothatforsampleswithgrainsofthemicrometerInterfacelevel,butnanocompositesshowedenhancedconductivitiesatthelowtemperatures.Interfacesandinterfacialconductionmechanismcanbeconcludedfo
8、rsuchconductivityenhancement.CrownCopyrightª2009PublishedbyElsevierLtdonbehalfofInternationalAssociationforHydrogenEnergy.Allrightsreserved.1.IntroductionTherearemanyinherentcost-effectiveandmarket-competi-ti