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Hierarchical vanadium pentoxide microflowers with excellent long-term cyclability at high rates for lithium ion batteries

Journal Article


Abstract


  • (Graph Presented) Hierarchical V2O5 microflowers composed of thin nanosheets have been achieved by a solvothermal reaction first and then a low-temperature calcination. These micro-flowers are characterized by powder X-ray diffractometer (XRD), scanning electron microscope (SEM), and transmission electron microscope (TEM). The nanoscale size and sheet-like structure of the building blocks in V2O5 microflowers make them a promising cathode material for lithium ion batteries. After 1500 cycles at a current density of 1 A g-1, the reversible capacity of V2O5 microflowers is kept at 104 mAh g-1. Even at a rate of 2 A g-1, the reversible capacity is still above 80 mAh g-1 after 3000 cycles. The excellent electrochemical properties of V2O5 microflowers are associated with their unique structure and capacitive feature.

Publication Date


  • 2014

Citation


  • Chen, L., Gu, X., Jiang, X., Wang, N., Yue, J., Xu, H., . . . Qian, Y. (2014). Hierarchical vanadium pentoxide microflowers with excellent long-term cyclability at high rates for lithium ion batteries. Journal of Power Sources, 272, 991-996. doi:10.1016/j.jpowsour.2014.09.048

Scopus Eid


  • 2-s2.0-84908547540

Start Page


  • 991

End Page


  • 996

Volume


  • 272

Issue


Place Of Publication


Abstract


  • (Graph Presented) Hierarchical V2O5 microflowers composed of thin nanosheets have been achieved by a solvothermal reaction first and then a low-temperature calcination. These micro-flowers are characterized by powder X-ray diffractometer (XRD), scanning electron microscope (SEM), and transmission electron microscope (TEM). The nanoscale size and sheet-like structure of the building blocks in V2O5 microflowers make them a promising cathode material for lithium ion batteries. After 1500 cycles at a current density of 1 A g-1, the reversible capacity of V2O5 microflowers is kept at 104 mAh g-1. Even at a rate of 2 A g-1, the reversible capacity is still above 80 mAh g-1 after 3000 cycles. The excellent electrochemical properties of V2O5 microflowers are associated with their unique structure and capacitive feature.

Publication Date


  • 2014

Citation


  • Chen, L., Gu, X., Jiang, X., Wang, N., Yue, J., Xu, H., . . . Qian, Y. (2014). Hierarchical vanadium pentoxide microflowers with excellent long-term cyclability at high rates for lithium ion batteries. Journal of Power Sources, 272, 991-996. doi:10.1016/j.jpowsour.2014.09.048

Scopus Eid


  • 2-s2.0-84908547540

Start Page


  • 991

End Page


  • 996

Volume


  • 272

Issue


Place Of Publication