Citation:
YANG Hui, LI Juan. Preparation and Properties of LiV3O8 Nanomaterials as Cathode Material for Li-ion Batteries[J]. Chinese Journal of Applied Chemistry,
;2009, 26(8): 989-992.
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LiV3O8 cathode nanomaterials were synthesized by a hydrothermal route at different reaction temperatures.The structures,morphologies and proprieties of the samples were investigated by XRD,TEM,galvanostatic charge-discharge,cyclic voltammetry(CV),and electrochemical impedance spectroscopy(EIS) techniques.With increase of hydrothermal temperature,the diameter of the particles increased,the size distribution became inhomogeneous,and the charge transfer resistance of the LiV3O8 electrode was decreased,which is of benefit to strip and insert of lithium-ion during the charging-discharging process.The sample synthesized at a hydrothermal temperature 180 ℃ has the highest discharge capacity and a good reversibility.Its specific discharge capacity is up to 290 mA·h/g in a range of 1.8~3.8 V in the first cycle.After 30 cycles,the discharge capacity of this electrode material is still above 200 mA·h/g.That is to say,there is some defect-amorphous in the structure of the materials,and there is a certain dimensional distributing of the particles,which can improve the electrochemical performances of the LiV3O8 cathode nanomaterials.
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Keywords:
- lithium-ion batteries,
- LiV3O8,
- nanomaterials,
- hydrothermal method
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