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

Research output: Contribution to journalArticle

15 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 languageEnglish
Pages (from-to)273-277
Number of pages5
JournalJournal of Alloys and Compounds
Volume470
Issue number1-2
DOIs
Publication statusPublished - 2009 Feb 20

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X ray absorption
Intercalation
Solid state reactions
Synchrotrons
Electronic properties
X ray diffraction analysis
Structural properties
Cathodes
Diffraction
Phase transitions
Spectroscopy
Lithium-ion batteries
Hot Temperature

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

Cite this

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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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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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 journalArticle

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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.

AU - Huang, Z. F.

AU - Baehtz, C.

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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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