Structural changes in LixMn2O4at 3.7 V induced by voltage excursions below 3.0 V

Kyung Yoon Chung; Jong Hee Kim; Kwang Bum Kim

doi:10.1149/1.2168267

Structural changes in Li_xMn₂O₄at 3.7 V induced by voltage excursions below 3.0 V

Kyung Yoon Chung, Jong Hee Kim, Kwang Bum Kim

Department of Materials Science and Engineering

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

6 Citations (Scopus)

Abstract

The 3.7 V peak observed in the cyclic voltammogram of Lix Mn2 O4 was investigated using the in situ bending beam method and synchrotron X-ray diffraction (XRD). The cyclic voltammogram (CV) at different cutoff voltages revealed the 3.7 V peak during the anodic scan only when the sample was subjected to the 3 V range. The differential strain curves (dεdt) obtained simultaneously with the CV indicated the presence of tensile strain in the vicinity of 3.7 V suggesting sample volume contractions due to a phase transformation. Synchrotron XRD confirmed that the material underwent a tetragonal to cubic phase transformation.

Original language	English
Pages (from-to)	A186-A189
Journal	Electrochemical and Solid-State Letters
Volume	9
Issue number	4
DOIs	https://doi.org/10.1149/1.2168267
Publication status	Published - 2006 Jan 1

All Science Journal Classification (ASJC) codes

Chemical Engineering(all)
Materials Science(all)
Physical and Theoretical Chemistry
Electrochemistry
Electrical and Electronic Engineering

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10.1149/1.2168267

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abstract = "The 3.7 V peak observed in the cyclic voltammogram of Lix Mn2 O4 was investigated using the in situ bending beam method and synchrotron X-ray diffraction (XRD). The cyclic voltammogram (CV) at different cutoff voltages revealed the 3.7 V peak during the anodic scan only when the sample was subjected to the 3 V range. The differential strain curves (dεdt) obtained simultaneously with the CV indicated the presence of tensile strain in the vicinity of 3.7 V suggesting sample volume contractions due to a phase transformation. Synchrotron XRD confirmed that the material underwent a tetragonal to cubic phase transformation.",

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T1 - Structural changes in LixMn2O4at 3.7 V induced by voltage excursions below 3.0 V

AU - Chung, Kyung Yoon

AU - Kim, Jong Hee

AU - Kim, Kwang Bum

PY - 2006/1/1

Y1 - 2006/1/1

N2 - The 3.7 V peak observed in the cyclic voltammogram of Lix Mn2 O4 was investigated using the in situ bending beam method and synchrotron X-ray diffraction (XRD). The cyclic voltammogram (CV) at different cutoff voltages revealed the 3.7 V peak during the anodic scan only when the sample was subjected to the 3 V range. The differential strain curves (dεdt) obtained simultaneously with the CV indicated the presence of tensile strain in the vicinity of 3.7 V suggesting sample volume contractions due to a phase transformation. Synchrotron XRD confirmed that the material underwent a tetragonal to cubic phase transformation.

AB - The 3.7 V peak observed in the cyclic voltammogram of Lix Mn2 O4 was investigated using the in situ bending beam method and synchrotron X-ray diffraction (XRD). The cyclic voltammogram (CV) at different cutoff voltages revealed the 3.7 V peak during the anodic scan only when the sample was subjected to the 3 V range. The differential strain curves (dεdt) obtained simultaneously with the CV indicated the presence of tensile strain in the vicinity of 3.7 V suggesting sample volume contractions due to a phase transformation. Synchrotron XRD confirmed that the material underwent a tetragonal to cubic phase transformation.

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JO - Electrochemical and Solid-State Letters

JF - Electrochemical and Solid-State Letters

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ER -

Structural changes in Li_xMn₂O₄at 3.7 V induced by voltage excursions below 3.0 V

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