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《Toward Understanding the Lithium Transport Mechanism in Garnet-type Solid Electrolytes Li+ Ion Exchanges and Their Mobility at OctahedralTetrahedral Sites》由會(huì)員上傳分享，免費(fèi)在線閱讀，更多相關(guān)內(nèi)容在學(xué)術(shù)論文-天天文庫(kù)。
1、Articlepubs.acs.org/cmTowardUnderstandingtheLithiumTransportMechanisminGarnet-+typeSolidElectrolytes:LiIonExchangesandTheirMobilityatOctahedral/TetrahedralSites???,§§??DaweiWang,GuimingZhong,WeiKongPang,ZaipingGuo,YixiaoLi,MatthewJ.McDonald,,∥⊥,?RiqiangFu,*Jin-XiaoMi,andYongYang*?CollaborativeI
2、nnovationCenterofChemistryforEnergyMaterials,StateKeyLabofPhysicalChemistryofSolidSurfaceand⊥DepartmentofChemistry,CollegeofChemistryandChemicalEngineeringandDepartmentofMaterialScienceandEngineering,XiamenUniversity,Xiamen361005,China?TheBraggInstitute,AustralianNuclearScienceandTechnologyOrga
3、nisation,LockedBag2001,KirraweeDC,NewSouthWales2232,Australia§InstituteforSuperconductingandElectronicMaterials,UniversityofWollongong,Wollongong,NewSouthWales2522,Australia∥NationalHighMagneticFieldLaboratory,1800E.PaulDiracDrive,Tallahassee,Florida32310,UnitedStates*SSupportingInformationABST
4、RACT:Thecubicgarnet-typesolidelectrolyteLi7La3Zr2O12withaliovalentdopingexhibitsahighionicconductivity,reachingupto～10?3S/cmatroomtemperature.FullyunderstandingtheLi+transportmechanismincludingLi+mobilityatdi?erentsitesisakeytopicinthis?eld,andLi7?2x?3yAlyLa3Zr2?xWxO12(0≤x≤1)areselectedastarget
5、electrolytes.X-rayandneutrondi?ractionaswellasacimpedanceresultsshowthatalowamountofaliovalentsubstitutionofZrwithWdoesnotobviouslya?ectthecrystalstructureandtheactivationenergyofLi+ionjumping,butitdoesnoticeablyvarythedistributionofLi+ions,electrostaticattraction/repulsion,andcrystaldefects,wh
6、ichincreasethelithiumjumprateandthecreationenergyofmobileLi+ions.Forthe?rsttime,high-resolutionNMRresultsshowevidencethatthe24d,96h,and48gsitescanbewell-resolved.Inaddition,ionicexchangebetweenthe24dand96hsitesisclearlyobserved,demonstratingalithiumtransportrouteof24d?96h?48g?96h?24d.Thelithium
7、mobilityatthe24dsitesisfoundtodominatethetotalionicconductivityofthesamples,withdi?usioncoe?cientsof10?9m2s?1and10?12m2s?1attheoctahedralandtetrahedralsites,respectively.conductivityofthecubicphase,usingelementssuchasAl3+,1.INTROD
