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1、ARTICLEDOI:10.1038/s41467-017-02727-2OPENNanostructuringone-dimensionalandamorphouslithiumperoxideforhighround-tripefficiencyinlithium-oxygenbatteriesArghyaDutta1,2,RaymondA.Wong1,2,3,WoonghyeonPark4,KeisukeYamanaka5,ToshiakiOhta5,YousungJung4,6&HyeRyungByon1,2,61234567890():,;Themaj
2、orchallengefacinglithium–oxygenbatteriesistheinsulatingandbulklithiumper-oxidedischargeproduct,whichcausessluggishdecompositionandincreasingoverpotentialduringrecharge.Here,wedemonstrateanimprovedround-tripefficiencyof~80%bymeansofamesoporouscarbonelectrode,whichdirectsthegrowthofone
3、-dimensionalandamorphouslithiumperoxide.Morphologically,theone-dimensionalnanostructureswithsmallvolumeandhighsurfaceshowimprovedchargetransportandpromotedelithiation(lithiumiondissolution)duringrechargeandthusplaysacriticalroleinthefaciledecompositionoflithiumperoxide.Thermodynamic
4、ally,densityfunctionalcalculationsrevealthatdisorderedgeometricarrangementsofthesurfaceatomsintheamorphousstructureleadtoweakerbindingofthekeyreactionintermediatelithiumsuperoxide,yieldingsmalleroxygenreductionandevolutionoverpotentialscomparedtothecrystallinesurface.Thisstudysugges
5、tsastrategytoenhancethedecompositionrateoflithiumperoxidebyexploitingthesizeandshapeofone-dimensionalnanostructuredlithiumperoxide.1DepartmentofChemistry,KoreaAdvancedInstituteofScienceandTechnology(KAIST),291Daehak-ro,Yuseong-gu,Daejeon34141,RepublicofKorea.2ByonInitiativeResearchU
6、nit,RIKEN,2-1Hirosawa,Wako,Saitama351-0198,Japan.3DepartmentofEnergySciences,TokyoInstituteofTechnology,4259Nagatsuta-cho,Midori-ku,Yokohama226-8502,Japan.4GraduateSchoolofEnergy,Environment,WaterandSustainability(EEWS),KAIST,291Daehak-ro,Yuseong-gu,Daejeon34141,RepublicofKorea.5Syn
7、chrotronRadiation(SR)Center,RitsumeikanUniversity,Kusatsu,Shiga525-8577,Japan.6AdvancedBatteryCenter,KAISTInstituteforNanoCentury,291Daehak-ro,Yuseong-gu,Daejeon34141,RepublicofKorea.CorrespondenceandrequestsformaterialsshouldbeaddressedtoY.J.(email:ysjn@kaist.ac.kr)ortoH.R.B.(email
8、:hrbyon@kaist.ac.kr
