High-capacity vanadium oxide material for Li-ion cathodes with good cycling stability

Researchers from the Beijing University of Chemical Technology and Japan’s National Institute of Advanced Industrial Science and Technology (AIST) have synthesized a high-capacity vanadium oxide cathode material for rechargeable Li-ion batteries via a combined freeze-drying method and appropriately post-treated in argon atmosphere.

Electrochemical tests performed on this material demonstrated its very high insertion capacity of 347 mAh g-1 (3.7 Li+ per LiV3O8) at a current density of 50 mA g-1 (C/6). Most important is that it displayed an excellent cycling stability and after 60 cycles, a discharge capacity with 351 mAh g-1 was obtained.

—Liu et al.

A paper on their work is in press in the journal Electrochimica Acta.

The researchers proposed that a short-range crystallographic order had a stronger influence on the electrochemical performance of an electrode material in this work, instead of the surface area, particle size and crystalline degree.

Resources

  • Haimei Liu, Yonggang Wang, Wensheng Yang and Haoshen Zhou (2010) A large capacity of LiV3O8 cathode material for rechargeable lithium-based batteries. Electrochimica Acta in press, doi: 10.1016/j.electacta.2010.10.049


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