International Journal of Electrochemical Science · 2012 · 10 citations · 24 references
Natural SciencesMaterials EngineeringMaterials ScienceElectrochemistryMaterials ChemistryNanomaterialsBattery Cell ChemistryBattery MaterialsElectrochemical CellsElectrochemical Energy StorageEnergy Storage MaterialsNanomaterials For Energy StorageBattery NanomaterialsCurrent DensityDischarge CapacityLithium-ion BatteriesLithium-ion Battery ChemistryLithium-ion Battery MaterialsNanostructured Battery MaterialsSpecific Discharge
Vanadyl ethylene glycolate (VEG) spheres with an average diameter of ~ 4μm composed of nanocubes were solvothermally prepared at 180 °C. The influence of temperature on the synthesis of VEG was investigated. When the temperature rised to 250 °C, the products experienced the transformation from VEG (IV) spheres to (NH4)2V6O16(V) flowers composed of flakes. Annealing the VEG (IV) spheres and (NH4)2V6O16(V) flakes in Ar atmosphere at 600 °C, V2O3 spheres and flakes were obtained. The electrochemical properties of the VEG and V2O3 were investigated in lithium-ion batteries. At a current density of 60 mA g-1 the initial specific discharge capacity of VEG spheres was 1826 mAh g-1 and even after 200 cycles the discharge capacity was still maintained at 477 mAh g-1. The initial specific discharge capacities of V2O3 spheres and flakes were up to 1179 and 1338 mAh g-1, respectively. After 50 cycles the discharge capacities of V2O3 spheres and flakes can also maintain at 466 and 665 mAh g-1, respectively.
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