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1、ElectrochemicalandSolid-StateLetters,89A437-A4402005A4371099-0062/2005/89/A437/4/$7.00©TheElectrochemicalSociety,Inc.SDC-CarbonateCompositeElectrolytesforLow-TemperatureSOFCszJianbingHuang,ZongqiangMao,LizhaiYang,andRanranPengInstituteofNuclearandNewEnergyTec
2、hnology,TsinghuaUniversity,100084,Beijing,ChinaNovelcompositematerialsbasedonmixturesofsamarium-dopedceriaSDC-carbonatewereexaminedforuseaselectrolytematerialsinlow-temperaturesolidoxidefuelcellsLTSOFCsoperatingat400-600°C.Thecompositeelectrolytesshowedhighionc
3、onductivityatevaluatedtemperatures.Compositionandcalcinationtemperaturewerefoundtoaffectthemorphologyandconductivityofthecompositeelectrolytesgreatly.Duringfuelcelloperation,waterwasobservedatbothelectrodes,indicatingthatthenewelectrolytematerialsconductbothoxygeni
4、onsandprotonsimultaneously.Accordingtofuelcellperformance,thesecompositeelectrolytesarechemicallystable,whichisanattractiveprospectinLTSOFCapplications.©2005TheElectrochemicalSociety.DOI:10.1149/1.1960139Allrightsreserved.ManuscriptsubmittedJanuary8,2005;revisedm
5、anuscriptreceivedApril21,2005.AvailableelectronicallyJuly18,2005.Low-temperaturesolidoxidefuelcellsLTSOFCshavereceivedpasteontoeithersideofthepellets,andheatedat600°Cfor40min.muchattentioninrecentyearsbecausetheymaydramaticallycon-Electricalconductivityofthepelle
6、tsampleswasthenmeasuredintributetothereductioninthecostofSOFCtechnology,inwhichairbyacimpedancespectroscopyatthetemperaturebetween400inexpensivematerialscanbeusedincellconstructionandnoveland650°C.ThemeasurementswereconductedusingaPerkinElmerfabricationtechniquesca
7、nbeappliedtothestackandsysteminte-5210frequencyresponseanalyzer0.5Hzto120KHzcombinedgrationsduetothelowoperatingtemperature.Moreover,thesystemwithEG&GPARpotentiostat/galvanostat263A.reliability,lifespan,andpotentialapplicationsofSOFCsystemin-ThepowderX-raydiffrac
8、tionXRDpatternsofthecompositecrease.However,conventionalyttrium-stabilizedzirconiaYSZelectrolyteswererecordedatroomtemperatureusingaD8diffrac
