石墨烯在能源领域中的应用.ppt

石墨烯在能源领域中的应用,蔡伟伟,厦门大学物理与机电工程学院,wwcai,AndreGeim,KonstantinNovoselov,UniversityofManchester,Manchester,UnitedKingdom,Prizemotivation“forgroundbreakingexperimentsregardingthetwo-dimensionalmaterialgraphene“,Content,1.WhyGrapheneSheets,2.Productionofgraphene,3.Applicationforenergy,“2D”Graphenesheet,,Wallace1947,,Lowenergyislikeamassless2DDiracmodel,MasslessDiracEquation,,,,kx,ky,E,Grapheneonsiliconoxide300nmgrownsilicon,,Newsarealsodeveloped.,,OutstandingpropertiesElectricalconductivityballisticelectrontransfer;highmobility1100GPamodulusstrongerthansteelDensity2.2g/cm3lightweightyetstrongThermalconductivity6000W/mKSurface-area-to-massratio2600m2/g,Graphenesheet,Alloftheabovemakegraphenesheetsanattractivematerial.,,,,,,1.Mechanicalexfoliation–Scotchtap;Veryhighquality;Microsize;2.EpitaxialgrowthonSiC;Highquality;Hugescale;Expensive;Reduction–Grapheneoxide;Prof.RuoffHighdefects;Mass;Sodiumreductionofethanol;Fromnanotubes;Graphenenanoribbon;6.Epitaxialgrowthonmetalsubstrates;Highquality;Largescalecentimeter;,,,Productionofgraphene,,MetalFe,Co,Ni,Cu,Pt,Pd,Temperature;,Carbonsolubilityinmetal;,Thicknessofmetal;,Thicknessofgraphite,,,Theamountsofcarbonatominmetal,,√,√,√,Carbon-nickelphasediagram,CarbonsolubilityinNiat900oC1,40nmNi,,Monolayergraphite,Carbon-copperphasediagram,CarbonsolubilityinCuat900oC0.01,10umCu,,Monolayergraphite,Synthesisoflarge-areagrapheneonmetal,SchematicdiagramofthecoldwallCVD,,Mono-,bi-,andtri-layergrapheneonCufoil,FewlayersgrapheneonNifilm,Synthesisoflarge-areagrapheneonmetal,,GrapheneonPMMA,,Grapheneonglassslide,Grapheneon300nmSiO2/Sisubstrate,GrapheneonSiNTEMgrid,Fe3,Synthesisoflarge-areagrapheneonmetal,TransparentconductingfilmTCFinmodernindustry,Solarcells,displays,touchscreen,Grapheneasatransparentconductingfilm,,,,Transmittance,Conductivity,onolayergraphene97.7,Electronmobilityatroomtemperature,Intrinsiclimits200,000cm2/Vs,Experiment23,000cm2/Vs,1014-1015cm-2,Sheetresistance100-10Ω/□,Transparentconductingfilm,,,Transmittance,Cu-900,Ni-950,,Conductivity,,Angulareffect,App.Phy.Lett.95,123115,Transparentconductingfilm,Transparentconductingfilm,Graphite,,Oxidant,Grapheneoxidesuspendedinwater,Sheets1nmthickdepositedonamicasurface.,,Hydrazine,Sonication,Reduction–Grapheneoxide,parallel-platecapacitor,Reducedgrapheneoxide,Ultracapacitor,Graphene-basedultracapactor,,,,,,,,MaterialAC;CNT;Graphene;,Graphene-basedultracapacitor,Graphene-basedultracapacitor,纽扣式超级电容,石墨烯的应用---锂离子电池,石墨烯graphene电极做负电极，锂电池的充电时间将能从2小时缩短到只要10分钟。,Applicationforenergy,SolarcellTransparentconductivefilm;Polymersolarcell;EnergystorageUltracapacitor;Li-ionbattery;Fuelcell,Thankyou,