Spectroscopic studies on cation-doped spinel LiMn2O4 for lithium ion batteries

Chuan Wu; Zhaoxiang Wang; Feng Wu; Liquan Chen; Xuejie Huang

doi:10.1016/S0167-2738(01)00968-7

Spectroscopic studies on cation-doped spinel LiMn₂O₄ for lithium ion batteries

Chuan Wu
, Zhaoxiang Wang
, Feng Wu
, Liquan Chen
, Xuejie Huang^*

^*Corresponding author for this work

School of Material Science and Engineering

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

81 Citations (Scopus)

Abstract

Raman spectroscopy, Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS) have been employed to characterize the structural and valence changes of cation-doped LiMn₂O₄ spinels. It is found that the spectral features of the cation-doped spinels are sensitive to the dopant content, the structure of the MO₆ (M=Li, Mn, Cr) groups, the charge distribution and the average oxidation state of Mn. Some new Raman bands have been observed in the low-frequency regions of the spectra of the heavy-doped Li_xMn_2-yCr_zO₄ (z≥0.2). These new bands are attributed to the vibrations of the Cr-O bonds. XPS study demonstrates a conversion of Cr³⁺ to Cr⁶⁺ with increasing Cr content in Li_xMn_2-yCr_zO₄. Based on the above results, the effects of cation doping on the structural variation of the spinels are discussed.

Original language	English
Pages (from-to)	277-285
Number of pages	9
Journal	Solid State Ionics
Volume	144
Issue number	3-4
DOIs	https://doi.org/10.1016/S0167-2738(01)00968-7
Publication status	Published - 11 Dec 2001

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Keywords

Cation doping
IR
LiMnO
Raman
XPS

Access to Document

10.1016/S0167-2738(01)00968-7

Cite this

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title = "Spectroscopic studies on cation-doped spinel LiMn2O4 for lithium ion batteries",

abstract = "Raman spectroscopy, Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS) have been employed to characterize the structural and valence changes of cation-doped LiMn2O4 spinels. It is found that the spectral features of the cation-doped spinels are sensitive to the dopant content, the structure of the MO6 (M=Li, Mn, Cr) groups, the charge distribution and the average oxidation state of Mn. Some new Raman bands have been observed in the low-frequency regions of the spectra of the heavy-doped LixMn2-yCrzO4 (z≥0.2). These new bands are attributed to the vibrations of the Cr-O bonds. XPS study demonstrates a conversion of Cr3+ to Cr6+ with increasing Cr content in LixMn2-yCrzO4. Based on the above results, the effects of cation doping on the structural variation of the spinels are discussed.",

keywords = "Cation doping, IR, LiMnO, Raman, XPS",

author = "Chuan Wu and Zhaoxiang Wang and Feng Wu and Liquan Chen and Xuejie Huang",

year = "2001",

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TY - JOUR

T1 - Spectroscopic studies on cation-doped spinel LiMn2O4 for lithium ion batteries

AU - Wu, Chuan

AU - Wang, Zhaoxiang

AU - Wu, Feng

AU - Chen, Liquan

AU - Huang, Xuejie

PY - 2001/12/11

Y1 - 2001/12/11

N2 - Raman spectroscopy, Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS) have been employed to characterize the structural and valence changes of cation-doped LiMn2O4 spinels. It is found that the spectral features of the cation-doped spinels are sensitive to the dopant content, the structure of the MO6 (M=Li, Mn, Cr) groups, the charge distribution and the average oxidation state of Mn. Some new Raman bands have been observed in the low-frequency regions of the spectra of the heavy-doped LixMn2-yCrzO4 (z≥0.2). These new bands are attributed to the vibrations of the Cr-O bonds. XPS study demonstrates a conversion of Cr3+ to Cr6+ with increasing Cr content in LixMn2-yCrzO4. Based on the above results, the effects of cation doping on the structural variation of the spinels are discussed.

AB - Raman spectroscopy, Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS) have been employed to characterize the structural and valence changes of cation-doped LiMn2O4 spinels. It is found that the spectral features of the cation-doped spinels are sensitive to the dopant content, the structure of the MO6 (M=Li, Mn, Cr) groups, the charge distribution and the average oxidation state of Mn. Some new Raman bands have been observed in the low-frequency regions of the spectra of the heavy-doped LixMn2-yCrzO4 (z≥0.2). These new bands are attributed to the vibrations of the Cr-O bonds. XPS study demonstrates a conversion of Cr3+ to Cr6+ with increasing Cr content in LixMn2-yCrzO4. Based on the above results, the effects of cation doping on the structural variation of the spinels are discussed.

KW - Cation doping

KW - IR

KW - LiMnO

KW - Raman

KW - XPS

UR - https://www.scopus.com/pages/publications/0035846487

U2 - 10.1016/S0167-2738(01)00968-7

DO - 10.1016/S0167-2738(01)00968-7

M3 - Article

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SN - 0167-2738

VL - 144

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EP - 285

JO - Solid State Ionics

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