nio纳米晶的制备和电化学性能

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1、224ÆVol.22No.4
20088ÆCHINESEJOURNALOFMATERIALSRESEARCHAugust2008NiO∗1122 1.4710032.200237–(Sol–Gel)NiO,  .,–,430NiO;,NiO

2、,;6002h40nmNiO.NiO10850mAh/g471mAh/g,!"!,NiO.Æ"#,,–,#,O646,TM9111005-3093(2008)04-0415-00PreparationandelectrochemicalpropertiesofnanocrystallineNiOZHAOShengli1WENJiuba1

3、∗∗WANGHongkang2ZHAOChongjun21.Schoolofmaterialsscience&engineering,Henanuniversityofscience&technology,Luoyang4710032.Instituteofmaterialsscience,EastChinauniversityofscience&technology,Shanghai200237*SupportedbyNationalNaturalScienceFoundationofChinaNo.205040

4、26andStatekeyProgrameforBasicResearchofChinaNo.ZM200103B01.ManuscriptreceivedSeptember11,2007;inrevisedformMay4,2008.**Towhomcorrespondenceshouldbeaddressed,Tel:(0379)64231269,E–mail:wenjiuba@mail.haust.edu.cnABSTRACTTheinfluenceofsinteringtemperatureonthemorph

5、ologyandstructureofNiOpowderpreparedbysol–gelwasexploredanditselectrochemicalperformancewaspreliminarilyinvestigated.Theresultsshowthatusingnickeldiacetate,citricacidandglycolasrawmaterial,thestablesolandgelaresynthesizedbyesterifyingandchelateringreaction.The

6、gelentirelydecomposesat430$andgraduallyformsthenanocrystallineNiOpowderduringheatingtreatment.Withtheincreasingofsinteringtemper-ature,nanosizedNiOpowderexhibitslargerandmoreuniformparticle,moreintegritycrystalstructureandhighelectrochemicalcyclingperformance.

7、TheNiOpowderconsistedwith40nmsphericalparticleisfabricatedbysinterringgelat600$for2hpossessinghighinitialand10thdischargespecialcapacityof850mAh/gand471mAh/g,whichisobviouslysuperiortothatobtainedbysolidphasemethodinelectrochemistryproperties.KEYWORDSinorganic

8、non–metallicmaterials,NiO,sol–gel,anodematerial,nanocrystalline#%&$%&''(
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