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.
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