Vanadates and vanadium oxides are potential lithium-ion electrode materials because of their easy preparation and high capacity properties.This paper reports the electrochemical lithium-storage performance of VO2 and ...Vanadates and vanadium oxides are potential lithium-ion electrode materials because of their easy preparation and high capacity properties.This paper reports the electrochemical lithium-storage performance of VO2 and NaV2O5 composite nanowire arrays.Firstly,Na5V12O32 nanowire arrays are fabricated by a hydrothermal method,and then VO2 and NaV2O5 composite nanowire arrays are prepared by a reduction reaction of Na5V12O32 nanowire arrays in hydrogen atmosphere.Crystal structure,chemical composition and morphology of the prepared samples are characterized in detail.The obtained composite is used as an electrode of a lithium-ion battery,which exhibits high reversible capacity and good cycle stability.The composite obtained at 500℃presents a specific discharge capacity up to 345.1 mA·h/g after 50 cycles at a current density of 30 mA/g.展开更多
基金Project(51201117)supported by the National Natural Science Foundation of China
文摘Vanadates and vanadium oxides are potential lithium-ion electrode materials because of their easy preparation and high capacity properties.This paper reports the electrochemical lithium-storage performance of VO2 and NaV2O5 composite nanowire arrays.Firstly,Na5V12O32 nanowire arrays are fabricated by a hydrothermal method,and then VO2 and NaV2O5 composite nanowire arrays are prepared by a reduction reaction of Na5V12O32 nanowire arrays in hydrogen atmosphere.Crystal structure,chemical composition and morphology of the prepared samples are characterized in detail.The obtained composite is used as an electrode of a lithium-ion battery,which exhibits high reversible capacity and good cycle stability.The composite obtained at 500℃presents a specific discharge capacity up to 345.1 mA·h/g after 50 cycles at a current density of 30 mA/g.
