纳米添加剂对镍氢电池正极电化学性能的影响

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1、广东工业大学硕士学位论文Especially,thedischargecapacityofpositiveelectrodewith4wt．％ofllano—ZnOupto305mAh／g，whichalsoshowsthehighest、longest、themostflatdischargeplatform．Inthefourthchapter,itisdiscussedthatinfluenceofllano-ZnOandCNTsontheelectrochemicalperformanceofMH／Nibatteries．Nano

2、-ZnOwaspreparedbythemethodofdirectprecipitation,andusedasadditivewithCNTstopreparethepositiveelectrodeofMH／Nibattery．Theinfluenceofelectrochemicalperformancewasinvestigatedinthepositiveelectrodewithdifferentcontentofnano-ZnOandCNTs．Theresultindicatethatallthepositiveelect

3、rodeswithmixingadditivesshowgreaterdischargecapacityretentionrateandnano-ZnOexpressesfinerelectrochemicalperformanceatthelow-rateof0．2C，andthepositiveelectrodewith4wt．％nano—ZnOexpresseshighestdischargecapacity,whichnotonlykeeps301mAh／gforthehighestdischargecapacity，butals

4、oretains292mAh／gafter40cycles．Atthehigh-rateof1C，thedischargecapacityofthepositiveelectrodeswithmixingadditivesdecreaseseriously,butCNTsindicatesbetterperformanceandthepositiveelectrodewithboth3wt．％ZnOandlwt．％CNTsexpressesgreatestdischargecapacity,especially,whichretain21

5、2mAh／gafter40cycles．Inthefifthchapter,itisarguedthattheinfluenceofllano—CuOontheelectrochemicalperformanceofMH／Nibatteries．Nano-CuOwaspreparedbythemethodofsolidphasesynthesis，andusedasadditivetopreparethepositiveelectrodeofMH／Nibattery．Theinfluenceofelectrochemicalperform

6、ancewasinvestigatedinthepositiveelectrodewithdifferentcontentofnano-CuO．Theresultindicatethatthepositiveelectrodewith4wt．％nano—CuOexpresseshighestdischargecapacityinthelowrateofO．2C，whichnotonlykeeps280mAh／gforthehighestdischargecapacity，butalsoretains270mAh／gafter40cycle

7、s；inthehighrateof1C，thepositiveelectrodewith4wt．％nano-CuOexpresseshighestdischargecapacity，whichnotonlykeeps252mAh／gforthehighestdischargecapacity，butalsoretains243mAh／gafter40cycles；Thus，throughthissubjectwecanknowthatnano-ZnOandnano-CuOisveryusefultoimprovetheactivation

8、performanceandefficiencyofnickelhydroxide，whichistheactivematerialforthepositiveelectrodeofMH／Ni