研究发现内共生氮化锂纤维素层可延长锂金属负极循环寿命-豆柴文库

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研究发现内共生氮化锂纤维素层可延长锂金属负极循环寿命
Title:EnhancedCyclingLifespanofLithiumMetalAnodebyIntercalatingNitrogen-DopedCelluloseNanofibersasSynergeticInterphase
Abstract:
Thepursuitofhighenergydensityandlong-termstabilityinlithium-ionbatteries(LIBs)hasledtoextensiveresearchonthedevelopmentofsuperioranodematerials.Inthisstudy,weinvestigatethepotentialofanovelstrategyinvolvingtheintercalationofnitrogen-dopedcellulosenanofibers(N-Cellulose)asaninterphaselayerforthelithiummetalanode.OurfindingsdemonstratethattheN-Celluloselayerimprovesthecyclinglifespanofthelithiummetalanodebymitigatingthedetrimentaleffectsofthesolid-electrolyteinterphase(SEI)formation,dendritegrowth,andvolumeexpansion,thusofferingapromisingsolutionforthedevelopmentofhigh-performancelithiummetalbatteries.
Introduction:
Lithiummetalisconsideredoneofthemostattractiveanodematerialsduetoitsextraordinarilyhightheoreticalcapacity.However,thepracticalapplicationoflithiummetalanodesinLIBshasbeenhinderedbyseveralchallenges,includingsafetyconcernsassociatedwithdendriteformationandtheunstablesolid-electrolyteinterphase(SEI)formationduringcycling.TheformationofastableandconductiveSEIlayeriscrucialforpreventingthedeleteriousreactionsbetweenthelithiummetalandelectrolyte.Moreover,theinherentvolumevariationduringlithiumplatingandstrippingcanleadtomechanicalfractureoftheSEIlayer,furtherworseningthestabilityissues.Therefore,thedevelopmentofeffectivestrategiestoaddresstheseissuesisofparamountimportance.
Methods:
Inthisstudy,wefabricatedthenitrogen-dopedcellulosenanofibers(N-Cellulose)viaasimpleandscalablemethod.TheN-Cellulosewasintercalatedasaninterphaselayerontothelithiummetalanodesurfacetoregulatethelithiation/delithiationbehavior.Themorphology,chemicalcomposition,andinterfacialcharacteristicsoftheN-Celluloselayerwereanalyzedusingscanningelectronmicroscopy(SEM),X-rayphotoelectronspectroscopy(XPS),andcontactanglemeasurements,respectively.TheelectrochemicalperformanceoftheN-Cellulosemodifiedlithiummetalanodewasevaluatedusingcoincellsand