Characterizations on the structural and electronic properties of thermal lithiated Li0.33MnO2

Y. J. Wei; H. Ehrenberg; K. B. Kim; C. W. Park; Z. F. Huang; C. Baehtz

doi:10.1016/j.jallcom.2008.02.036

Characterizations on the structural and electronic properties of thermal lithiated Li_0.33MnO₂

Y. J. Wei, H. Ehrenberg, K. B. Kim, C. W. Park, Z. F. Huang, C. Baehtz

Department of Materials Science and Engineering

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

17 Citations (Scopus)

Abstract

A 3 V cathode material for lithium ion batteries, Li_0.33MnO₂, was synthesized by solid-state reaction. Two Mn crystallographic positions, Mn₍₁₎ and Mn₍₂₎, were determined by X-ray diffraction analysis. The [Mn₍₂₎O₆] octahedron had a lower symmetrical degree than that of [Mn₍₁₎O₆], which was attributed to the geometrical effects of the non-symmetrical environment around Mn₍₂₎. Li_0.33MnO₂ delivered a reversible discharge capacity ∼140 mA h g^-1. In situ synchrotron diffraction clearly showed a reversible phase transition of Li_0.33MnO₂ during electrochemical process. The analysis of X-ray absorption near edge spectroscopy observed the conversion of Mn⁴⁺ to Mn³⁺ with Li⁺ intercalation into Li_0.33MnO₂, accompanied by the formation of more severely distorted [MnO₆] octahedron.

Original language	English
Pages (from-to)	273-277
Number of pages	5
Journal	Journal of Alloys and Compounds
Volume	470
Issue number	1-2
DOIs	https://doi.org/10.1016/j.jallcom.2008.02.036
Publication status	Published - 2009 Feb 20

All Science Journal Classification (ASJC) codes

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

UN SDGs

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

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10.1016/j.jallcom.2008.02.036

Cite this

@article{da4e649b0e4645508bf32ff8ee081998,

title = "Characterizations on the structural and electronic properties of thermal lithiated Li0.33MnO2",

abstract = "A 3 V cathode material for lithium ion batteries, Li0.33MnO2, was synthesized by solid-state reaction. Two Mn crystallographic positions, Mn(1) and Mn(2), were determined by X-ray diffraction analysis. The [Mn(2)O6] octahedron had a lower symmetrical degree than that of [Mn(1)O6], which was attributed to the geometrical effects of the non-symmetrical environment around Mn(2). Li0.33MnO2 delivered a reversible discharge capacity ∼140 mA h g-1. In situ synchrotron diffraction clearly showed a reversible phase transition of Li0.33MnO2 during electrochemical process. The analysis of X-ray absorption near edge spectroscopy observed the conversion of Mn4+ to Mn3+ with Li+ intercalation into Li0.33MnO2, accompanied by the formation of more severely distorted [MnO6] octahedron.",

author = "Wei, {Y. J.} and H. Ehrenberg and Kim, {K. B.} and Park, {C. W.} and Huang, {Z. F.} and C. Baehtz",

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T1 - Characterizations on the structural and electronic properties of thermal lithiated Li0.33MnO2

AU - Wei, Y. J.

AU - Ehrenberg, H.

AU - Kim, K. B.

AU - Park, C. W.

AU - Huang, Z. F.

AU - Baehtz, C.

PY - 2009/2/20

Y1 - 2009/2/20

N2 - A 3 V cathode material for lithium ion batteries, Li0.33MnO2, was synthesized by solid-state reaction. Two Mn crystallographic positions, Mn(1) and Mn(2), were determined by X-ray diffraction analysis. The [Mn(2)O6] octahedron had a lower symmetrical degree than that of [Mn(1)O6], which was attributed to the geometrical effects of the non-symmetrical environment around Mn(2). Li0.33MnO2 delivered a reversible discharge capacity ∼140 mA h g-1. In situ synchrotron diffraction clearly showed a reversible phase transition of Li0.33MnO2 during electrochemical process. The analysis of X-ray absorption near edge spectroscopy observed the conversion of Mn4+ to Mn3+ with Li+ intercalation into Li0.33MnO2, accompanied by the formation of more severely distorted [MnO6] octahedron.

AB - A 3 V cathode material for lithium ion batteries, Li0.33MnO2, was synthesized by solid-state reaction. Two Mn crystallographic positions, Mn(1) and Mn(2), were determined by X-ray diffraction analysis. The [Mn(2)O6] octahedron had a lower symmetrical degree than that of [Mn(1)O6], which was attributed to the geometrical effects of the non-symmetrical environment around Mn(2). Li0.33MnO2 delivered a reversible discharge capacity ∼140 mA h g-1. In situ synchrotron diffraction clearly showed a reversible phase transition of Li0.33MnO2 during electrochemical process. The analysis of X-ray absorption near edge spectroscopy observed the conversion of Mn4+ to Mn3+ with Li+ intercalation into Li0.33MnO2, accompanied by the formation of more severely distorted [MnO6] octahedron.

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