摻雜CeO-,2-基IT-SOFC關(guān)鍵材料的制備和性能研究.pdf

1、東南大學(xué)碩士學(xué)位論文摻雜CeO基ITSOFC關(guān)鍵材料的制備和性能研究姓名：查燕申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：材料物理與化學(xué)指導(dǎo)教師：孫岳明20090515ABSTRACTABSTRACTSolidoxideruelcell(SOFC)isakindofgreenenergyresource，theperformanceofSOFCsystemisdeterminedbythepropertiesofthekeymaterials111ekey

2、materialsofintermediatetemperaturesolidoxidefileleelI(11“SOFC)basedondopedceriaelectrolytewerepreparedanditspropertieswereevaluatedthepreparationtechniqueandrelatedperformanceofsingleeellwerediscussedSm—dopedceriainterme

3、diatetemperaturesolidelectrolytepowderCe0sSm02019(SDC)wassynthesizedbyglycinenitratemethodsolgelmethodandpolyacrylamides01gelmethodrespectivelyTheinfluencestotheformingofcrystalbydifferentsinteringtemperatureanddi毹rentme

4、thodswerediscussedXRDshowsthatSDCpowdersareobtainedaftersinteringat700℃for4hXRD：thesizeofSDCpowderpreparedbydifferentkindsofmethodsaresimilarandupto13～20nm，whichareIargerthancalculatedparticlesize，SDCpowderpreparedbythes

5、csoftchemicalmethodshasgooddecentralizationandisnoteasyteunitcTheaDparentdensityofSDCpowderpreparedbysolgelmethodislargestitssinteringperformanceissuperiort0thosepreparedbyothermethodsanditismoreappropriateforthepreparat

6、ionofelectrolytematerialsSDCpowderwaspressedintoshapeandsinteredat1250℃，1350℃，1450℃for5hSDCsinterswerecharacterizedbySEM，EDS，shrinkageratio，densityandopenholeratioandelectricalpropertiesTheresultsshowthatSDCsinterprepare

7、dbysolgelmethodwhichsinteredat1250℃for5hhaslargestshrinkageratioandsmallestopenholeratioitssurfaceandsidearcdensestwith948l％theconductivityat800℃is0131Scm。andtheconductivityactivationene啊is6514kJ／m01Theresultsindicateult

8、eriorlythatSDCpowderpreparedbysolgelmethodismoreappropriateforthepreparationofelectrolytematerialsInthepapersinglecellswerepreparedusingSmdopedceria(SDC)preparedbysolgelmethodaselectrolyte，SDCand(LaosSro2)098Mn036(LSM)as

9、cathode，Cu—CobimetallicinSDCasanodeTheelectricalpropertiesandopencircuitresistanceofSDCfCu、Co(2：8)ISDCISDCLSMsingleeellwastestedintheoperatingrangeof600～750℃whenusingH2fuels；theelectricalpropertiesandopencircuitresistanc

10、eofSDCCu、Co(1：9)lSDClSDCLSMsinglecellwastestedat700℃whenusingH2andCH4fuelsTheresultsshowthattheopencircuitvoltageofSDCCu、C“2：8)ISDCISDCLSMsingleeellreduceswithincreasingternperature，themaximumopen℃circuitvoltagereaches08

11、8Vat600℃：thepowderdensityincreaseswithincreasingtemperatureandthehi2hestpowderdensitiesat600℃、650℃、700℃and750℃reach2mW／cm26mW倫m‘，11mW倫m‘，20mW倫m2AtthesametemperaturetheopencircuitvoltagesofSDCCu、Co(1：9)ISDCISDCLSMsingleee

12、llundertwofuelconditionsareveryhi曲，theopencircuitvoltage(085ⅥofthesinglecellwhenusingH2fuelishi曲erthantheopencircuitvoltage(0725v)ofmesinglecellwhenusingCH4fuel；thepowderdensity(14mW／cm‘)ofthesingleeellwhenusingH2fue“smu

13、chhigherthanthepowderdensity(2mW／cm2)ofthesingleeellwhenusingCH4fueI，thecalculatedresultshowsthatthepowderdensityofthesingleeellwhenusingC84fileldecays8571％thanthepowderdensityofthesingleeellwhenUSingH，fuel，carbonexistsc

14、learlyTheresistanceofSDCCu、Co(2：8)ISDCISDCLSMsinglecellreduceswithincreasingternperatureinterfacialresistancereducesgreatly，theratioofinterfacialresistanceandelectrolyteresistancereducesTheelectrolyteresistanceandtheinte

15、rfacialresistanceofSDCCu、Co㈣)ISDCISDCLSMsingleeellwhenusingCH4fuelismuchhigherthanthatwhenusingH2fuel，theratioofinterfacialresistanceandelectrolyteresistanceissimilarKeywords：IntermediateTemperatureSolidOxideFuelCell；Dop