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Synthesis of LiV3O8 nanocrystallites as cathode materials for lithium ion batteries

✍ Scribed by Hui Yang; Juan Li; Xiao-gang Zhang; Yong-li Jin


Publisher
Elsevier Science
Year
2008
Tongue
English
Weight
865 KB
Volume
207
Category
Article
ISSN
0924-0136

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✦ Synopsis


Lithium vanadium oxides were prepared by low heating solid-state method in which LiOHβ€’H 2 O and NH 4 VO 3 were used as starting reactants to synthesize a precursor containing Li and V, and then obtained the resulting products by calcining the precursor separately at 300, 400 and 500 β€’ C for 6 h. Characterization by powder X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM) and thermo-gravimetric analysis (TGA) shows that these oxides are ascribed as same as that of crystalline layered lithiated trivanadate and the crystallinity, size and morphology of the LiV 3 O 8 varied with calcined temperature. The LiV 3 O 8 compound prepared by this synthesis method gave a good charge-discharge and cycle performance. A specific capacity of 342 mAh g -1 is obtained in the range of 1.8-3.8 V in the first cycle when the sample obtained at 300 β€’ C. PEG added during the synthetic process makes the dimension of the particles uniform but does not affect the electrochemical properties of LiV 3 O 8 .


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