Local structure of vanadium in doped LiFePO 4 | Zendy

Zhao Ting | Zendy; Xu Wei | Zendy; Ye Qing | Zendy; Cheng Jie | Zendy; Zhao Haifeng | Zendy; Wu Ziyu | Zendy; Xia Dingguo | Zendy; Chu Wangsheng | Zendy

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Local structure of vanadium in doped LiFePO 4

Author(s) -

Zhao Ting,

Xu Wei,

Ye Qing,

Cheng Jie,

Zhao Haifeng,

Wu Ziyu,

Xia Dingguo,

Chu Wangsheng

Publication year - 2010

Publication title -

journal of synchrotron radiation

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.172

H-Index - 99

ISSN - 1600-5775

DOI - 10.1107/s0909049510025434

Subject(s) - vanadium , doping , crystal structure , materials science , dopant , oxidation state , inorganic chemistry , crystallography , chemistry , metal , metallurgy , optoelectronics

LiFePO 4 composites with 5 at.% vanadium doping are prepared by solid state reactions. X‐ray absorption fine‐structure spectroscopy is used as a novel technique to identify vanadium sites. Both experimental analyses and theoretical simulations show that vanadium does not enter into the LiFePO 4 crystal lattice. When the vanadium concentration is lower then 1 at.%, the dopant remains insoluble. Thus, a single‐phase vanadium‐doped LiFePO 4 cannot be formed and the improved electrochemical properties of vanadium‐doped LiFePO 4 previously reported cannot be associated with crystal structure changes of the LiFePO 4 via vanadium doping.

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