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

Wei, Y. J. and Ehrenberg, Helmut and Kim, K. B. and Park, C. B. and Huang, Z. F. and Baehtz, Carsten (2009):
Characterizations on the structural and electronic properties of thermal lithiated Li0.33MnO2.
In: Journal of Alloys and Compounds, pp. 273-277, 470, (1-2), ISSN 09258388,
[Online-Edition: http://dx.doi.org/10.1016/j.jallcom.2008.02.036],
[Article]

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 not, vert, similar140 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]

Item Type: Article
Erschienen: 2009
Creators: Wei, Y. J. and Ehrenberg, Helmut and Kim, K. B. and Park, C. B. and Huang, Z. F. and Baehtz, Carsten
Title: Characterizations on the structural and electronic properties of thermal lithiated Li0.33MnO2
Language: English
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 not, vert, similar140 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]

Journal or Publication Title: Journal of Alloys and Compounds
Volume: 470
Number: 1-2
Uncontrolled Keywords: Lithium battery; Electrode materials; Crystal structure; Electronic property
Divisions: DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue > B - Characterisation > Subproject B4: In situ investigations of the degradation of intercalation batteries and their modelling
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue > B - Characterisation
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue
Zentrale Einrichtungen
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres
DFG-Collaborative Research Centres (incl. Transregio)
Date Deposited: 15 Aug 2011 10:40
Official URL: http://dx.doi.org/10.1016/j.jallcom.2008.02.036
Additional Information:

SFB 595 B4

Identification Number: doi:10.1016/j.jallcom.2008.02.036
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