Abstract
We report on the suppression of FeLi• antisite defects in LiFe(PO 4)1-xF3x with 0 ≤ x ≤ 0.4 prepared by sol-gel and hydrothermal methods. Evidence for a systematic suppression of antisite defects upon fluorine doping in LiFePO4 is inferred from Fourier transform infrared spectra, wherein a noticeable red shift in the symmetric P-O stretching vibrational mode of (PO4) 3- polyanion from 970 to 957 cm-1 was observed. We report detailed structural and compositional studies of LiFe(PO4) 1-xF3x, and discuss the implications for the performance of LiFePO4 cathodes in lithium ion batteries.
Original language | American English |
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Pages (from-to) | 96-99 |
Number of pages | 4 |
Journal | Scripta Materialia |
Volume | 69 |
Issue number | 1 |
DOIs | |
State | Published - Jul 2013 |
Keywords
- Antisite defects
- Phospho-olivine
- FTIR
- HRTEM
- Nanomaterials
EGS Disciplines
- Materials Science and Engineering