Suppression of FeLi Antisite Defects in Fluorine-Doped LiFePO4

A. V. Radhamani, C. Karthik, R. Ubic, M. S. Ramachandra Rao, C. Sudakar

Research output: Contribution to journalArticlepeer-review

32 Scopus citations

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 languageAmerican English
Pages (from-to)96-99
Number of pages4
JournalScripta Materialia
Volume69
Issue number1
DOIs
StatePublished - Jul 2013

Keywords

  • Antisite defects
  • Phospho-olivine
  • FTIR
  • HRTEM
  • Nanomaterials

EGS Disciplines

  • Materials Science and Engineering

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