固體氧化物燃料電池三元顆粒電極電化學理論模擬與優(yōu)化.pdf

1、中國科學技術大學碩士學位論文固體氧化物燃料電池三元顆粒電極電化學理論模擬與優(yōu)化姓名：周惠申請學位級別：碩士專業(yè)：凝聚態(tài)物理指導教師：林子敬20100501AbstractABSTRACTSolidOxideFuelcells(SOFC)havebeenrecognizedfortheirunsurpassedefficiencyandessentiallypollutionfreeoperationHoweverinordertoent

2、erthemainstreampowermarkets，hi曲reliabilityandeconomicfeasibilityarecrucialDualnano—composite(threecomponent)electrodeshaveaconsiderableamountofNiYSZpore(orLSM—YSZporeatcathode)threephaseboundaries(TPBs)atthecontiguousreg

3、ionbetweentheYSZelectrolyteandtheelectrodesbecauseoftheverysmallgrainsizeofthedualcompositepowderandshowexcellentdurability(nearlyzerodegradation)whichattributetothehomogeneous，durable，andhighlyefficientelectrodesmadefro

4、mthedualcompositepowderThisthesisanalysestheCompositionalinfluenceofnanocompositeelectrodesonimprovedperformanceofsolidoxidefuelcells；Anddevelopeda2DModelformodelingtheratioofthedifferentdualcompositecomponentselectrodes

5、ofSOFCbyusingfiniteelementmethodThethesisisdividedintofourchaptersInchapterI，wegiveanoverviewoftheresearchbackgroundoffuelcellfollowedwithabriefdiscussionofthematerialanddesignofsolidoxidefuelcellChapterIIconsistsofsolid

6、oxidefuelcellprincipleofthermodynamicsandelectrochemistrymasstransporttypeinporouselectrodeandabrieflydiscussionofnumericalsimulationandfiniteelementanalysisworksInchapterIII，a2Dmodelforthesolidoxidefuelcellmadefromthedu

7、alcompositepowderisdescribedThemodelconsideredtheparticlepercolationinfluenceontheSOFCelectrodes，lnasstransportintheelectrodes，electronicandionicconductionsinthemembraneelectrodeassemblyandtheelectrochemicalreactionsatth

8、ethreephaseboundariesAndcalculatedthecellperformancewithdifferentvolumefractionofLSMnanoparticlesandYSZnanoparticlesrespectivelyBasedonthe2Dmodel，inChapterIVwesimulateandoptimizethenanocompositeelectrodesButtonsolidoxide