资源描述：
《JPS 172 2007 410》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。
1、JournalofPowerSources172(2007)410415ShortcommunicationSynthesisofspinelLiMn2O4nanoparticlesthroughone-stephydrothermalreactionC.H.Jianga,b,∗,S.X.Doub,H.K.Liub,M.Ichiharac,H.S.Zhoua,∗∗aEnergyTechnologyResearchInstitute,NationalInstituteofAdvancedIndustrialScienceandTechnolo
2、gy,Umezono1-1-1,Tsukuba,Ibaraki305-8568,JapanbInstituteforSuperconductingandElectronicMaterials,UniversityofWollongong,NorthfieldsAvenue,Wollongong,NSW2522,AustraliacInstituteforSolidStatePhysics,TheUniversityofTokyo,Kashiwanoha,Kashiwa,Chiba277-8581,JapanReceived6June2007;
3、receivedinrevisedform18July2007;accepted23July2007Availableonline27July2007AbstractPhasepurespinelLiMn2O4nanoparticlescanbedirectlysynthesizedbyone-stephydrothermalreactionof-MnO2withLiOHinaninitialLi/Mnratioof1at200◦C.ThereactionmightinvolvearedoxreactionbetweenMn4+andOH
4、−,andtheformationofLiMnOatthesametime24undertheproposedhydrothermalconditions.Thishydrothermalprocessissimplesinceonly-MnO2powdersareusedastheMnsource,whereaswithoutuseofanyoxidants,reductants,orlowvalenceMnsource.Theelectrochemicalperformanceoftheas-synthesizedLiMn2O4nan
5、oparticlestowardsLi+insertion/extractionwasexamined.Rathergoodcapacityandcycleperformance,andanespeciallyexcellenthighratecapability,wereobservedforthesamplethatwashydrothermallyreactedfor3days.©2007ElsevierB.V.Allrightsreserved.Keywords:SpinelLiMn2O4;Hydrothermalsynthesis
6、;Li-ionbatteries;Ratecapability1.Introductionsis,Liinsertion/extractionmechanism,elementsubstitution,andelectrochemistryhavebeendoneinordertofacilitateitsLi-ionbatteriesarethemajorpowersourcesoftodayspracticalapplications[37].Ingeneral,theelectrochemicalper-portableelectro
7、nicdevicesandalsopossiblyforfutureelec-formanceofLiMn2O4isintimatelyrelatedtoitsphasepurity,tricvehicles,providedthatthepowerandenergydensitiescrystallinity,particlesize,andmorphology[8].Allofthesecouldbefurtherimproved.Thepositiveelectrodematerialofaspectscanbecorrelatedt
8、othematerialssynthesis.Conven-commercializedLi-ionbatteriesisLiCoO2,whichhasmanytionally,
