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Citation: TONG Qing-Song, LIU Yong-Mei, SHI Ji-Cheng, LIAN Jin-Ming. Electrochemical Performance of the Fluorine Ion Doped Lithium Vanadium Oxides[J]. Chinese Journal of Applied Chemistry, ;2006, 23(7): 776-781. shu

Electrochemical Performance of the Fluorine Ion Doped Lithium Vanadium Oxides

1.
College of Chemistry and Materials, Fujian Normal University, Fuzhou 350007

Corresponding author: TONG Qing-Song,
Received Date: 13 August 2005
Available Online: 25 January 2006
Fund Project: 教育部重点、福建省教育厅重点(03065,JA02159) (03065,JA02159)福建省自然科学基金(E0510014) (E0510014)福建省科技厅(2005K012)资助课题 (2005K012)

Via the solid-phase synthesizing method,a series of fluorine ion doped lithium vanadium oxides with the fluorine contents of 0.059%,0.19%,0.35% and 0.56%(mass fraction) was synthesized at 400℃, respectively.The experimental results show that the oxidation state of the vanadium of the fluorine ion doped lithium vanadium oxides is decreased with the increase of fluorine content in the samples and the doped lithium vanadium oxide with a fluorine content of 0.19%(mass fraction) shows a monoclinic structure of Li_1.2V₃O₈ and exhibits a max capacity of 272 mA·h/g and has a capacity fading rate of 16% in 40 cycles.Thermal analysis,XRD and Raman analysis showed that the fluorine dopant can stabilize the crystal structure of lithium vanadium oxides.
- lithium ion battery,
- positive material,
- fluorine dopant,
- lithium vanadium oxide
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