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Synthesis and electrochemical properties of V2O5 nanostructures prepared via a precipitation process for lithium-ion battery cathodes

Journal Article


Abstract


  • One-dimensional (1D) nanostructures of vanadium pentoxide (V2O5) have been successfully synthesized via a precipitation process followed by heating in vacuum at 300 ðC. The samples have been characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and electrochemical testing by techniques such as cyclic voltammetry (CV) and dischargecharge cycling in lithium cells. Average crystal size of these oxides increased from 36 to 83 nm as annealing time was increased from 45 min to 1 h, which also led to a decrease in BrunauerEmmettTeller (BET) specific surface area from 41 to 17 m2 g1. Good cyclability and high capacity (>200 mAh g1) were achieved in the voltage range of 2.04.0 V (versus Li metal) at a current rate of 50 mA g1 by annealing the oxides for 1 h. The increase in crystallinity and higher yield of one-dimensional nanostructure oxides contributed significantly to the improved capacity and enhanced cycle life.

Publication Date


  • 2007

Citation


  • Ng, S., Chew, S., Wang, J., Wexler, D., Tournayre, Y., Konstantinov, K. K. & Liu, H. K. (2007). Synthesis and electrochemical properties of V2O5 nanostructures prepared via a precipitation process for lithium-ion battery cathodes. Journal of Power Sources, 174 (2), 1032-1035.

Scopus Eid


  • 2-s2.0-36148969997

Ro Metadata Url


  • http://ro.uow.edu.au/engpapers/2825

Has Global Citation Frequency


Number Of Pages


  • 3

Start Page


  • 1032

End Page


  • 1035

Volume


  • 174

Issue


  • 2

Abstract


  • One-dimensional (1D) nanostructures of vanadium pentoxide (V2O5) have been successfully synthesized via a precipitation process followed by heating in vacuum at 300 ðC. The samples have been characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and electrochemical testing by techniques such as cyclic voltammetry (CV) and dischargecharge cycling in lithium cells. Average crystal size of these oxides increased from 36 to 83 nm as annealing time was increased from 45 min to 1 h, which also led to a decrease in BrunauerEmmettTeller (BET) specific surface area from 41 to 17 m2 g1. Good cyclability and high capacity (>200 mAh g1) were achieved in the voltage range of 2.04.0 V (versus Li metal) at a current rate of 50 mA g1 by annealing the oxides for 1 h. The increase in crystallinity and higher yield of one-dimensional nanostructure oxides contributed significantly to the improved capacity and enhanced cycle life.

Publication Date


  • 2007

Citation


  • Ng, S., Chew, S., Wang, J., Wexler, D., Tournayre, Y., Konstantinov, K. K. & Liu, H. K. (2007). Synthesis and electrochemical properties of V2O5 nanostructures prepared via a precipitation process for lithium-ion battery cathodes. Journal of Power Sources, 174 (2), 1032-1035.

Scopus Eid


  • 2-s2.0-36148969997

Ro Metadata Url


  • http://ro.uow.edu.au/engpapers/2825

Has Global Citation Frequency


Number Of Pages


  • 3

Start Page


  • 1032

End Page


  • 1035

Volume


  • 174

Issue


  • 2