Ionothermal synthesis and electrochemical performance of ferric vanadate
FeVO4 nanoparticles with uniform particle size were successfully synthesized from calcination and post-treatment of the ferric vanadaten precursor,which was prepared by ionothermal synthesis method using ionic liquid 1-butyl-3-methylimidazolium bromide([Bmim]Br)as reaction solvent.The structure and morphology of the obtained samples were then characterized by SEM,XRD,XPS,TEM and N2 adsorption-desorption.The FeVO4 nanoparticles were further used as anode material to construct lithium-ion batteries,and the electrochemical performance of the battery was evaluated by constant current charging and discharging test,cyclic voltammetry(CV)and electrochemical impedance.The results showed that the FeVO4 electrode showed excellent cycling and electrochemical performance at high current density,with an initial discharge capacity of 1471.58 mA·h/g at 300 mA/g.After 100 cycles at 300 mA/g,a high specific capacity of 783.00 mA·h/g was obtained.This excellent electrochemical performance might be attributed to the nanoscale size of the electrode material.
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