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 | |
| Publication status | Published - 2009 Feb 20 |
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All Science Journal Classification (ASJC) codes
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry
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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 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.
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, 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.
UR - http://www.scopus.com/inward/record.url?scp=59449091745&partnerID=8YFLogxK
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U2 - 10.1016/j.jallcom.2008.02.036
DO - 10.1016/j.jallcom.2008.02.036
M3 - Article
VL - 470
SP - 273
EP - 277
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
SN - 0925-8388
IS - 1-2
ER -