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1、文献汇报硬膜板上催化作用下的自限性组装:用在锂硫电池中的中尺度石墨烯纳米壳汇报人:XXX目录SourceofthearticleResearchbackgroundAbstractIntroductionResultsandDiscussionConclusionsSourceofthearticleResearchbackgroundALi-Sbatteriy:hightheoreticalenergydensityof2600Wh/kg;S:naturallyabundant,economicallyeffective,an
2、denvironmentallyfriendly;Grapheneandothernanostructuredcarbonmaterials:excellentconductivity,highspecificsurfacearea,accommodatelargevolumeexpansion;Issues:Li-Sbattery:poorcyclinglifeandrateperformanceS:largevolumetricexpansion,poorconductivityGraphene:couldn’tintegr
3、ateallthestructuralbenefits.TheconceptofHGNsmightbeapromisingstrategy,whichyetcallsfornewsyntheticmethodology.ResearchbackgroundB研究背景:中空纳米结构对提升电池性能有巨大优势,但传统方法难以制作研究目的:提升锂硫电池容量;提高电池稳定性解决方案:中空石墨烯纳米球壳结构,嵌入硫合成复合材料,作为电池正极AbstractHollownanostructures:表面积大;活性部位充分暴露;物质输运的动力学
4、性能优良;表面通透性好Amesoscaleapproachtofabricategrapheneshells:催化剂作用下,在原位形成的纳米颗粒上实现纳米石墨烯的自限性组装Use:石墨烯纳米球壳作为基体与S复合,用作锂硫电池正极材料Properties:初始放电容量:1520mAh/g(0.1C)电流密度从0.1C提升至2.0C,70%容量保持1000次循环,每次衰减0.06%IntroductionHollownanostructures的优势Hollownanostructures的合成困境Hollownanostructu
5、res新的合成方案Hollownanostructures的优势Applications:catalysis,adsorption,chemicalsensors,drug/genedelivery,andenergystorage/conversionsystemsHollownanocrystals:mesoscalehollowstructure,nanoscalequantumeffects,andatomic-scaleperiodicarrangementHollowgraphenenanoshells(HGNs):
6、favourableelectricalconductivity,goodsurfacefunctionality,mechanical/chemicalstability,andbiocompatibilityHollownanostructures的合成困境Thetemplate-freeorself-templatingbottom-upapproaches:hardlyextendedtoHGNsynthesis;Atemplate-involvingtop-downstrategy:nocatalyticcapabil
7、itytoregularlymanagethearrangementofcarbonatoms;Thus,controllablesynthesisofHGNswithanengineeredhollowcavity,predeterminedlayernumber,smallsize,andhighlycrystallinefew-layergrapheneshellsisrarelyachievedHollownanostructures新的合成方案Amesoscalecatalyticself-limitedassembl
8、yofhollowgraphenesphereswasproposed.Hardtemplatesandworkingcatalysts:insituformednickel-basedNPsCarbonsource:dodecylsulfate(DS)3Dme