Double-shelled hollow microspheres of LiMn2O4

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1、ViewOnline/JournalHomepage/TableofContentsforthisissueJournalofDynamicArticleLinksC

2、oCao,Tie-JunZhu,Hong-MingYuandCheng-YueSunReceived3rdMarch2011,Accepted28thApril2011DOI:10.1039/c1jm10924cDouble-shelledhollowmicrospheresofLiMnOwerepreparedbycapability.17Moreover,thestructuralstrainresultedfromrepeated24Li+ionsinsertion/extractionprocessescouldbebufferedbytheafacileself-t

3、emplatemethod.Theinnerandoutershellsoftheinteriorvoidspace,henceimprovingcyclingstability.Louetal.18obtainedmicrospheresarecomposedofnanoparticleswithdiametersrangingbetween200–400nm.Galvanostaticcharge/dischargehavereportedSnO2hollownanospheres,exhibitingahighreversiblechargecapacityof1140

4、mAhg
1andimprovedcyclingperformance.cyclingshowsthatthismaterialdeliversadischargecapacityof19127mAhg
1atC/10rateandacapacityretainabilityof80%afterSihollownanospheresreportedbyMaandco-workersalso800cyclesat5Crate,revealingahighreversiblecapacity,superiorexhibitedmuchimprovedcyclinglifeandr

5、atecapability.Comparedtothesehollowstructureswithsingleshells,double-shelledcounter-ratecapabilityandexcellentcyclingstabilityunderhighrates.The+partshavesomeparticularadvantages,suchasmorerobustshells,improvedperformanceisattributedtotheshortLiiondiffusionpresentingthesynergisticeffectofth

6、etwoshellsintougheningthelengthsinthenanobuildingblocksandthevoidcoreandspacewalls.20Inaddition,ithasbeendemonstratedthattheshell-in-shellbetweentheinnerandoutershellstoaccommodatethevolumestructureexhibitsanenhancedmechanicalstrengthandpreservedexpansion/contractionduringLi+ionsinsertion/e

7、xtractionprocesses.permeability.21Double-shellednanocapsulesofVO-based25compositesreportedbyXueandco-workers22exhibittheimprovedratecapabilityandcyclingperformanceasbothcathodeandanodeforLIBs.Maetal.23alsoreportedthatdouble-shelledhollowstruc-Introductio