Suppression of FeLi Antisite Defects in Fluorine-Doped LiFePO4

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

doi:10.1016/j.scriptamat.2013.02.015

Suppression of Fe_Li Antisite Defects in Fluorine-Doped LiFePO₄

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

Micron School of Materials Science and Engineering

Indian Institute of Technology Madras
Boise State University

Research output: Contribution to journal › Article › peer-review

43 Scopus citations

Abstract

We report on the suppression of FeLi• antisite defects in LiFe(PO ₄)_1-xF_3x 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-xF_3x, and discuss the implications for the performance of LiFePO₄ cathodes in lithium ion batteries.

Original language	American English
Pages (from-to)	96-99
Number of pages	4
Journal	Scripta Materialia
Volume	69
Issue number	1
DOIs	https://doi.org/10.1016/j.scriptamat.2013.02.015
State	Published - Jul 2013

Keywords

Antisite defects
Phospho-olivine
FTIR
HRTEM
Nanomaterials

EGS Disciplines

Materials Science and Engineering

Access to Document

10.1016/j.scriptamat.2013.02.015

https://doi.org/10.1016/j.scriptamat.2013.02.015

Cite this

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title = "Suppression of FeLi Antisite Defects in Fluorine-Doped LiFePO4",

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.",

keywords = "Antisite defects, Phospho-olivine, FTIR, HRTEM, Nanomaterials",

author = "Radhamani, \{A. V.\} and C. Karthik and R. Ubic and \{Ramachandra Rao\}, \{M. S.\} and C. Sudakar",

year = "2013",

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language = "American English",

volume = "69",

pages = "96--99",

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TY - JOUR

T1 - Suppression of FeLi Antisite Defects in Fluorine-Doped LiFePO4

AU - Radhamani, A. V.

AU - Karthik, C.

AU - Ubic, R.

AU - Ramachandra Rao, M. S.

AU - Sudakar, C.

PY - 2013/7

Y1 - 2013/7

N2 - 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.

AB - 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.

KW - Antisite defects

KW - Phospho-olivine

KW - FTIR

KW - HRTEM

KW - Nanomaterials

UR - https://scholarworks.boisestate.edu/mse_facpubs/151

UR - https://doi.org/10.1016/j.scriptamat.2013.02.015

U2 - 10.1016/j.scriptamat.2013.02.015

DO - 10.1016/j.scriptamat.2013.02.015

M3 - Article

SN - 1359-6462

VL - 69

SP - 96

EP - 99

JO - Scripta Materialia

JF - Scripta Materialia

IS - 1

ER -