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1、www.advenergymat.dewww.MaterialsViews.comHigher,Stronger,Better…AReviewof5VoltCathodeMaterialsforAdvancedLithium-IonBatteriesREVIEWAlexanderKraytsbergandYairEin-Eli*insidethecathodematerial,beingoxi-Theever-increasingdemandforhigh-performing,economical
2、,andsafedizedbyatransitionmetalredoxcouple.powerstorageforportableelectronicsandelectricvehiclesstimulatesR&DWhereaslithiummobilityinthecarbonanodeissufÞcientlyhigh,thedevelopmentinthefieldofchemicalpowersources.Inthepasttwodecades,lithium-ionofcathodem
3、aterialswithsubstantialLi+-technologyhasprovenitselfamostrobusttechnology,whichdelivershighmobilityturnedouttobeanissueofprimeenergyandpowercapabilities.Atthesametime,currenttechnologyrequiresimportance.SuchamaterialwasÞrstpre-thattheenergyandpowercapa
4、bilitiesofLi-ionbatteriesbe‘beefedup’sentedbyWhittingham,[1]whoemployedbeyondtheexistingstateoftheart.IncreasingthebatteryvoltageisoneofaTiS2-basedcathodematerialinacellthewaystoimprovebatteryenergydensity;inLi-ioncells,theobjectiveofwithametallicLiano
5、de.ThestructureofTiS2compriseslayersofhexagonalclose-currentresearchistodevelopa5-voltcell,andatthesametimetomaintainpackedoctahedralatomicgroups,formedhighspecificchargecapacity,excellentcycling,andsafety.Sincecurrentbyalayeroftitaniumatomsbetweentwoan
6、odematerialspossessworkingpotentialsfairlyclosetothepotentialoflayersofsulfuratoms,[5]thusallowingalithiummetal,thefocusisonthedevelopmentofcathodematerials.ThisinsertionofLi+intothelayeredgap.Uponworkreviewsandanalyzesthecurrentstateoftheart,achieveme
7、nts,anddischarge,Li+ionsoccupythevacantocta-hedralsitesbetweenthelayers;thechargechallengesinthefieldofhigh-voltagecathodematerialsforLi-ioncells.Somebalanceismaintainedbyelectroncurrentsuggestionsregardingpossibleapproachesforfuturedevelopmentinthe4+vi
8、atheexternalcircuit,convertingTiintofieldarealsopresented.Ti3+.Areverseprocessoccursoncharging,maintainingthepristineTiS2structure.Thisworkpromotedresearchonother1.IntroductionsulÞdesandchalcogenidesduringthe1970sand1980s;how-ever,cellse
