Pd空心微球催化剂.pdf

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1、Availableonlineatwww．sciencedireet．com一Transactionsof鼯静ScienceDirectNonferrousMetalsSocietyofChinaELs踟ERPressTrans．NonferrousMet．Soc．China24(2014)164—170www．tnmsc．en一MnO2nanoneedle—basedhollowmicrospherescoatedwithPdnanoparticlesasanovelcatalystforrechargeablelithium。——airbatterie

2、sMingzHANG，Qiangxu，LinSANG，FeiDING，Xing-jiangLIU，Li·fang儿AO1．SchoolofChemicalEngineeringandTechnology,TianjinUniversity,Tianjin300072，China；2．NationalKeyLaboratoryofScienceandTechnologyonPowerSourcesTianiinInstituteofPowerSources，Tianjin300384，China；3．KeyLaboratoryofAdvancedEnergy

3、MaterialsChemistry,MinistryofEducation，NankaiUniversity,Tianiin300071．ChinaReceived23November2012：accepted20April2013Abstract：Thehollow6c．MnO，nanoneedle．basedmicrospherescoatedwimPdnanoparticleswerereportedasanove1catalystforrechargeablelithium-airbatteries．Thehollowmicrospheresar

4、ecomposedofn—MnO，nanoneedles．Pdnanoparticlesaredepositedonthehollowmicrospheresthroughanaqueous．solutionreductionofPdC1，withNaBH4atroomtemperature．TheresultsOfTEM，XRD．andEDSshowthatthePdnanoparticlesarecoatedonthesurfaceof—MnO，nanoneedlesuniformlyandthemassfractionOfPdinthePd．coat

5、ed．MnO，catalystisabout8．88％．Comparedwiththecounterpartofthehollow。[一MnO，catalyst，thehollowPd．coated“．MnO，catalystimprovestheenergyconversionemciencyandthecharge-dischargecyclingperformanceoftheairelectrode．TheinitialspecificdischargecapacityofanairelectrodecomposedofSuperPcarbonan

6、dtheas—preparedPd．coatedH—MnO，catalystis1220mA·h／gfbasedonthetotalelectrodemass)atacurrentdensityof0．1mA／cm．andthecapacityretentionrateisabout47．3％after13charge—dischargecycles．Theresultsofcharge—dischargecyclingtestsdemonstratethatthisnove1Pd．coateda．MnO，catalystwithahierarchical

7、core-shellstructureisapromisingcatalystforthe1ithium-airbattery．Keywords：lithium—airbattery；compositecatalyst；nanoneedlebasedhollowmicrosphere；core-shellstructureenergydensityof250-350W·h／kg．Suchalithium-air1IntroductionbaterycomprisesaLi—containinganode，anorganicelectrolyteandana

8、ircathode『5—71．Traditionalcathode