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

Kyung Yoon Chung, Jong Hee Kim, Kwang Bum Kim

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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 languageEnglish
Pages (from-to)A186-A189
JournalElectrochemical and Solid-State Letters
Volume9
Issue number4
DOIs
Publication statusPublished - 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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