In Situ Raman Spectroscopy of Single Microparticle Li +-Intercalation Electrodes

Kaoru Dokko, Qingfang Shi, Ionel C. Stefan, Daniel Alberto Scherson

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Abstract

Modifications in the vibrational properties of a single microparticle of LiMn2O4 induced by extraction and subsequent injection of Li+ into the lattice have been monitored in situ via simultaneous acquisition of Raman scattering spectra and cyclic voltammetry data in 1 M LiClO4 solutions in ethylene carbonate (EC):diethyl carbonate (DEC) mixtures (1:1 by volume). Statistical analyses of the spectra in the range 15 < SOD < 45%, where SOD represents the state of discharge (in percent) of the nominally fully charged material, i.e., λ-MnO2, were found to be consistent with the coexistence of two distinct phases of lithiated metal oxide in agreement with information derived from in situ X-ray diffraction (XRD) measurements involving more conventional battery-type electrodes.

Original languageEnglish
Pages (from-to)12549-12554
Number of pages6
JournalJournal of Physical Chemistry B
Volume107
Issue number46
Publication statusPublished - 2003 Nov 20
Externally publishedYes

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ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

Cite this

Dokko, K., Shi, Q., Stefan, I. C., & Scherson, D. A. (2003). In Situ Raman Spectroscopy of Single Microparticle Li +-Intercalation Electrodes. Journal of Physical Chemistry B, 107(46), 12549-12554.