Characterizations on the structural and electronic properties of thermal lithiated Li
                        0.33
                        MnO
                        2

Y. J. Wei; H. Ehrenberg; Kwang Bum 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 _0.33 MnO ₂

Y. J. Wei, H. Ehrenberg, Kwang Bum Kim, C. W. Park, Z. F. Huang, C. Baehtz

Department of Materials Science and Engineering

Research output: Contribution to journal › Article

16 Citations (Scopus)

Abstract

A 3 V cathode material for lithium ion batteries, Li _0.33 MnO ₂ , 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₎ O ₆ ] octahedron had a lower symmetrical degree than that of [Mn ₍₁₎ O ₆ ], which was attributed to the geometrical effects of the non-symmetrical environment around Mn ₍₂₎ . Li _0.33 MnO ₂ delivered a reversible discharge capacity ∼140 mA h g ^-1 . In situ synchrotron diffraction clearly showed a reversible phase transition of Li _0.33 MnO ₂ during electrochemical process. The analysis of X-ray absorption near edge spectroscopy observed the conversion of Mn ⁴⁺ to Mn ³⁺ with Li ⁺ intercalation into Li _0.33 MnO ₂ , accompanied by the formation of more severely distorted [MnO ₆ ] 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

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Wei, Y. J., Ehrenberg, H., Kim, K. B., Park, C. W., Huang, Z. F., & Baehtz, C. (2009). Characterizations on the structural and electronic properties of thermal lithiated Li _0.33 MnO ₂ Journal of Alloys and Compounds, 470(1-2), 273-277. https://doi.org/10.1016/j.jallcom.2008.02.036

Wei, Y. J. ; Ehrenberg, H. ; Kim, Kwang Bum ; Park, C. W. ; Huang, Z. F. ; Baehtz, C. / Characterizations on the structural and electronic properties of thermal lithiated Li _0.33 MnO ₂ In: Journal of Alloys and Compounds. 2009 ; Vol. 470, No. 1-2. pp. 273-277.

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title = " Characterizations on the structural and electronic properties of thermal lithiated Li 0.33 MnO 2 ",

abstract = " A 3 V cathode material for lithium ion batteries, Li 0.33 MnO 2 , 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) O 6 ] octahedron had a lower symmetrical degree than that of [Mn (1) O 6 ], which was attributed to the geometrical effects of the non-symmetrical environment around Mn (2) . Li 0.33 MnO 2 delivered a reversible discharge capacity ∼140 mA h g -1 . In situ synchrotron diffraction clearly showed a reversible phase transition of Li 0.33 MnO 2 during electrochemical process. The analysis of X-ray absorption near edge spectroscopy observed the conversion of Mn 4+ to Mn 3+ with Li + intercalation into Li 0.33 MnO 2 , accompanied by the formation of more severely distorted [MnO 6 ] octahedron.",

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Wei, YJ, Ehrenberg, H, Kim, KB, Park, CW, Huang, ZF & Baehtz, C 2009, ' Characterizations on the structural and electronic properties of thermal lithiated Li _0.33 MnO ₂ ', Journal of Alloys and Compounds, vol. 470, no. 1-2, pp. 273-277. https://doi.org/10.1016/j.jallcom.2008.02.036

Characterizations on the structural and electronic properties of thermal lithiated Li _0.33 MnO ₂ . / Wei, Y. J.; Ehrenberg, H.; Kim, Kwang Bum; Park, C. W.; Huang, Z. F.; Baehtz, C.

In: Journal of Alloys and Compounds, Vol. 470, No. 1-2, 20.02.2009, p. 273-277.

Research output: Contribution to journal › Article

TY - JOUR

T1 - Characterizations on the structural and electronic properties of thermal lithiated Li 0.33 MnO 2

AU - Wei, Y. J.

AU - Ehrenberg, H.

AU - Kim, Kwang Bum

AU - Park, C. W.

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AU - Baehtz, C.

PY - 2009/2/20

Y1 - 2009/2/20

N2 - A 3 V cathode material for lithium ion batteries, Li 0.33 MnO 2 , 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) O 6 ] octahedron had a lower symmetrical degree than that of [Mn (1) O 6 ], which was attributed to the geometrical effects of the non-symmetrical environment around Mn (2) . Li 0.33 MnO 2 delivered a reversible discharge capacity ∼140 mA h g -1 . In situ synchrotron diffraction clearly showed a reversible phase transition of Li 0.33 MnO 2 during electrochemical process. The analysis of X-ray absorption near edge spectroscopy observed the conversion of Mn 4+ to Mn 3+ with Li + intercalation into Li 0.33 MnO 2 , accompanied by the formation of more severely distorted [MnO 6 ] octahedron.

AB - A 3 V cathode material for lithium ion batteries, Li 0.33 MnO 2 , 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) O 6 ] octahedron had a lower symmetrical degree than that of [Mn (1) O 6 ], which was attributed to the geometrical effects of the non-symmetrical environment around Mn (2) . Li 0.33 MnO 2 delivered a reversible discharge capacity ∼140 mA h g -1 . In situ synchrotron diffraction clearly showed a reversible phase transition of Li 0.33 MnO 2 during electrochemical process. The analysis of X-ray absorption near edge spectroscopy observed the conversion of Mn 4+ to Mn 3+ with Li + intercalation into Li 0.33 MnO 2 , accompanied by the formation of more severely distorted [MnO 6 ] octahedron.

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Wei YJ, Ehrenberg H, Kim KB, Park CW, Huang ZF, Baehtz C. Characterizations on the structural and electronic properties of thermal lithiated Li _0.33 MnO ₂ Journal of Alloys and Compounds. 2009 Feb 20;470(1-2):273-277. https://doi.org/10.1016/j.jallcom.2008.02.036