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Corresponding Author

Zuo long YU

Abstract

The cathode materials Li 1+x Mn 2O 4 were prepared with citric acid complexing and solution impregnating methods.Structure characterization and specific surface area test were performed by means of XRD,BET methods ,the influences of calcination temperature,Li/Mn molar ratio and raw materials on the structure and electrochemical capacity of samples have beem examined.The results showed that the Li/Mn molar ratio and calcimation temperature were the key factors affecting the electrochemical capacity of cathode materias.The optimum conditions for synthesis of Li 1+x Mn 2O 4 cathode material were 0≤x≤0.05 and calcined at 750°C.The initial capacity of the sample reached 120 mAh/g and capacity retention after 50 cycles was 115 mAh/g.

Keywords

Li ion Battery, Spinel structure, Lithium manganese oxide, Complex method, Impergnation method

Publication Date

2000-08-28

Online Available Date

2000-08-28

Revised Date

2000-08-28

Received Date

2000-08-28

References

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[4 ] LiuW ,KowalK ,FarringtonGC .ElectrochemicalcharacteristicsofspinelphaseLiMn2 O4basedcathodematerialspreparedbythePechiniProcess Influenceoffiringtemperatureanddopants[J] .JElectrochemSoc,1996 ,14 3:35 90 .

[5 ] XiaYY ,TakeshigeH ,NoguchiH ,etal.StudiesonanLi Mn Ospinelsystem(obtainedbymelt impregnation)ascathodefor 4Vlithiumbatteries PartI.Synthesisandelectrochemi calbehaviorofLixMn2 O4 [J] .JPowerSource.1995 ,5 6 :6 1.

[6 ] XiaYY ,YoshioM .StudiesonanLi Mn Ospinelsystem(obtainedbymelt impregnation)ascathodefor 4Vlithiumbatteries PartⅡ .Optimumspinelfromγ MnOOH [J] .PowerSiurce .1995 ,5 7:1.

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