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1、最新參賽課件主講：*****MnO/Ccore–shellnanorodsashighcapacityanodematerialsforlithium-ionbatteriesJournalofPowerSourcesFourparts1.Introduction2.Experiment3.Resultsanddiscussion4.ConclusionsIntroductiontransitionmetaloxideshaveattractedgreatattentionasanodematerialsforlithiumionbatteries,dueto1
2、theirhightheoreticalcapacity2safety3lowcost4naturalabundanceSomeobstacle1poorcyclingperformance(largevolumeexpansionduetothegenerationofLi2O)2poorelectronicconductivity(electrodematerialswithdesignednanostructurecanimproveit)MnOshowsrelativelylowelectromotiveforce電動(dòng)勢(emf)value(1.032?
3、Vvs.Li+/Li)andhighdensity(5.43?g?cm?3).However,thiskindofmaterialhasseldombeenreportedasananodematerialnanocrystallineMnOthinfilm,andMnOpowderasanodehasshownlowoverpotential超電勢andgoodcyclingperformanceInthispaperThepreparedMnO/Ccore–shellnanorodsmuchhigherspecificcapacitythanthatofMn
4、OmicroparticlesandMnO2nanowiresasanodematerialoflithiumionbattery.返回Experiment合成部分MnO/Ccore–shellnanorodsweresynthesizedbythereductionofcarbonprecursorcoatedMnO2nanowires.TheMnO2nanowiresweresynthesizedbyatypicalhydrothermalreactionExperiment表征X-raydiffractionFieldemissionscanningele
5、ctronmicroscopy(FESEM）transmissionelectronmicroscopy(TEM)SAEDExperiment電化學(xué)實(shí)驗(yàn)部分performingusing2032coin-typecellsassembledinanargon-filledgloveboxslurry:activematerials(70?wt%),acetyleneblack乙炔黑(20?wt%),andpolyvinylidenefluoride聚偏二氟乙烯(PVDF10?wt%)inN-methyl-2-pyrrolidone氮甲基二吡咯烷酮(NMP).Th
6、eslurrywasspreadontotheCufoilwithadoctorblade刮墨刀片anddriedat120?°CovernightundervacuumExperimentelectrodeareais1?cm2loadingofactivematerialis1.0–1.2?mg?cm?2electrolyte:asolutionof1?MLiPF6inethylenecarbonate碳酸亞乙酯(EC)anddimethylcarbonate碳酸二甲酯(DMC)withaweightratioof1:1ExperimentPurelithi
7、umfoilwasusedascounterandreferenceelectrodeCyclicvoltammetry循環(huán)伏安法(CV)Charge–dischargetestingwasperformedintherangeof0.01–3.0?Vspecificcapacity返回Resultsanddiscussion1、MnO2nanowiresweresynthesizedbyhydrothermalreaction.Thecrystalstructureoftheas-preparedMnO2nanowireswasconfirmedbyXRD(F
8、ig.1)Allthed
