In situ Raman spectroscopic study of thin-film Li1-xMn2O4 electrodes

Naomi Anzue; Takashi Itoh; Mohamed Mohamedi; Minoru Umeda; Isamu Uchida

doi:10.1016/S0167-2738(02)00693-8

In situ Raman spectroscopic study of thin-film Li_1-xMn₂O₄ electrodes

Naomi Anzue, Takashi Itoh, Mohamed Mohamedi, Minoru Umeda, Isamu Uchida

Advanced Interdisciplinary Research Division

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

27 Citations (Scopus)

Abstract

In order to investigate structural changes in lithium manganese oxide during the insertion and extraction of lithium ions, Raman spectra of thin films of Li_1-xMn₂O₄ produced by electrostatic spray deposition (ESD) were recorded in situ during a voltammetric scan in 1 M LiClO₄ in propylene carbonate (PD)/ethylene carbonate (EC) solutions. Five Raman-active bands, as predicted by the theory, were observed for the Li_1-xMn₂O₄ compound. The λ-MnO₂ phase has a distinct band at 592 cm^-1 and therefore can be clearly recognized from Raman spectra. The changes observed in Raman lines of Li_1-xMn₂O₄ were ascribed to the occurrence of the phase transition of Li_1-xMn₂O₄ electrodes. From the energy-dependence of Raman spectra, it is suggested that each value of x in Li_1-xMn₂O₄ possesses its own electronic band structure.

Original language	English
Pages (from-to)	301-307
Number of pages	7
Journal	Solid State Ionics
Volume	156
Issue number	3-4
DOIs	https://doi.org/10.1016/S0167-2738(02)00693-8
Publication status	Published - 2003 Jan

Keywords

Cyclic voltammetry
In situ Raman
LiMnO
Thin-film electrodes

ASJC Scopus subject areas

Chemistry(all)
Materials Science(all)
Condensed Matter Physics

Access to Document

10.1016/S0167-2738(02)00693-8

Cite this

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title = "In situ Raman spectroscopic study of thin-film Li1-xMn2O4 electrodes",

abstract = "In order to investigate structural changes in lithium manganese oxide during the insertion and extraction of lithium ions, Raman spectra of thin films of Li1-xMn2O4 produced by electrostatic spray deposition (ESD) were recorded in situ during a voltammetric scan in 1 M LiClO4 in propylene carbonate (PD)/ethylene carbonate (EC) solutions. Five Raman-active bands, as predicted by the theory, were observed for the Li1-xMn2O4 compound. The λ-MnO2 phase has a distinct band at 592 cm-1 and therefore can be clearly recognized from Raman spectra. The changes observed in Raman lines of Li1-xMn2O4 were ascribed to the occurrence of the phase transition of Li1-xMn2O4 electrodes. From the energy-dependence of Raman spectra, it is suggested that each value of x in Li1-xMn2O4 possesses its own electronic band structure.",

keywords = "Cyclic voltammetry, In situ Raman, LiMnO, Thin-film electrodes",

author = "Naomi Anzue and Takashi Itoh and Mohamed Mohamedi and Minoru Umeda and Isamu Uchida",

note = "Funding Information: The present work was partly supported by grants-in-aid for Priority Area A (No. 12022208 for “New Protium Function”), and Encouragement of Young Scientists (No. 12750724 and No. 13750755), from the Ministry of Education, Science, Sports, and Culture, Japan. Surface profile measurements were performed in the Center for Interdisciplinary Research of Tohoku University.",

year = "2003",

month = jan,

doi = "10.1016/S0167-2738(02)00693-8",

language = "English",

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pages = "301--307",

journal = "Solid State Ionics",

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T1 - In situ Raman spectroscopic study of thin-film Li1-xMn2O4 electrodes

AU - Anzue, Naomi

AU - Itoh, Takashi

AU - Mohamedi, Mohamed

AU - Umeda, Minoru

AU - Uchida, Isamu

N1 - Funding Information: The present work was partly supported by grants-in-aid for Priority Area A (No. 12022208 for “New Protium Function”), and Encouragement of Young Scientists (No. 12750724 and No. 13750755), from the Ministry of Education, Science, Sports, and Culture, Japan. Surface profile measurements were performed in the Center for Interdisciplinary Research of Tohoku University.

PY - 2003/1

Y1 - 2003/1

N2 - In order to investigate structural changes in lithium manganese oxide during the insertion and extraction of lithium ions, Raman spectra of thin films of Li1-xMn2O4 produced by electrostatic spray deposition (ESD) were recorded in situ during a voltammetric scan in 1 M LiClO4 in propylene carbonate (PD)/ethylene carbonate (EC) solutions. Five Raman-active bands, as predicted by the theory, were observed for the Li1-xMn2O4 compound. The λ-MnO2 phase has a distinct band at 592 cm-1 and therefore can be clearly recognized from Raman spectra. The changes observed in Raman lines of Li1-xMn2O4 were ascribed to the occurrence of the phase transition of Li1-xMn2O4 electrodes. From the energy-dependence of Raman spectra, it is suggested that each value of x in Li1-xMn2O4 possesses its own electronic band structure.

AB - In order to investigate structural changes in lithium manganese oxide during the insertion and extraction of lithium ions, Raman spectra of thin films of Li1-xMn2O4 produced by electrostatic spray deposition (ESD) were recorded in situ during a voltammetric scan in 1 M LiClO4 in propylene carbonate (PD)/ethylene carbonate (EC) solutions. Five Raman-active bands, as predicted by the theory, were observed for the Li1-xMn2O4 compound. The λ-MnO2 phase has a distinct band at 592 cm-1 and therefore can be clearly recognized from Raman spectra. The changes observed in Raman lines of Li1-xMn2O4 were ascribed to the occurrence of the phase transition of Li1-xMn2O4 electrodes. From the energy-dependence of Raman spectra, it is suggested that each value of x in Li1-xMn2O4 possesses its own electronic band structure.

KW - Cyclic voltammetry

KW - In situ Raman

KW - LiMnO

KW - Thin-film electrodes

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