资源描述：
《Synthesis of Spherical Graphite Particles and Their Application as Cathode Material in Dual-Ion Cells》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。
1、ECSTransactions,66(11)1-12(2015)10.1149/06611.0001ecst©TheElectrochemicalSocietySynthesisofSphericalGraphiteParticlesandTheirApplicationasCathodeMaterialinDual-IonCellsaaabAndreasHeckmann,PaulMeister,Hinrich-WilhelmMeyer,ArnoRohrbach,aaMartinWinter,TobiasPlackeaUniversityofMuenster,MEETBatteryRese
2、archCenter,InstituteofPhysicalChemistry,Corrensstraße46,48149Muenster,GermanybUniversityofMuenster,InstituteofMineralogy,Corrensstraße24,48149Muenster,GermanyInthiswork,carbonsphereshavinganaverageparticlediameterof0.6µmwerepreparedbyasimplehydrothermalsynthesismethodusingglucoseasprecursor.Thesec
3、arbonsphereswerecarbonizedandgraphitizedatdifferenttemperatures,namely1200°C,2100°C,2400°Cand2800°C,inordertostudytheimpactofthecarbonstructuralproperties,i.e.particlemorphologyanddegreeof-graphitization,ontheTFSIanionintercalationbehaviorintothesegraphitizedcarbonsusedascathodematerialindual-ionc
4、ells.Thestructuralpropertiesofthecarbonspheres,suchasparticlesize,surfacemorphology,specificsurfaceareaandcrystallinityafterheat-treatmentarecharacterizedbyscanningelectronmicroscopy,X-raydiffractionandnitrogenadsorptionmeasurements.Consequently,thestructuralcharacteristicsarecorrelatedtotheelectr
5、ochemicalresultsforapplicationascathodematerialindual-ioncells.Inthiscontext,ahighdegreeofgraphitizationismandatorytoachieveahighreversiblecapacity.IntroductionSincegraphiticcarbondisplaysaredox-amphotericcharacter,itispossibletointercalateabroadrangeofdifferentcationsandanionsbetweenitsplanargrap
6、henesheetsatspecificpotentials(1,2).Byintercalationofcations,likelithiumions,donor-typegraphiteintercalationcompounds(GICs)areformed,whiletheintercalationofanionsyieldsacceptor-typeGICs(3).Inrecentpublications,weproposedthedual-ioncellaselectrochemicalenergystoragesystemusinggraphiteaspositiveelec
7、trodematerial(3-8).Inthistypeofcell,notonlythelithiumionsparticipateinthestoragemechanismbutalsotheelectrolyteanionstakepart.Therefore,theelectrolyteneedstobeconsideredasactivematerialaswell.Sincethestoragemechan
