Formation of an SEI on a LiMn2O4 cathode during room temperature charge-discharge cycling studied by soft X-ray absorption spectroscopy at the Fluorine K-edge

Kyung Yoon Chung, Won Sub Yoon, Kwang Bum Kim, Byung Won Cho, Xiao Qing Yang

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

The solid electrolyte interface (SEI) formation on the surface of LiMn 2O4 electrodes during room temperature charge-discharge cycling was studied using soft X-ray absorption spectroscopy at the Fluorine (F) K-edge. LiMn2O4 electrodes without any binder were prepared by electrostatic spray deposition to eliminate the signal originating from the PVDF binder in the F K-edge X-ray absorption spectra. The F K-edge absorption spectra show that the SEI layer forms at a very early stage of cycling. SEI growth takes place during discharge. In addition, LiFformation is accelerated if the discharge step follows a charge step. The F K-edge absorption spectra suggest that the major component of the SEI is LiF.

Original languageEnglish
Pages (from-to)1295-1299
Number of pages5
JournalJournal of Applied Electrochemistry
Volume41
Issue number11
DOIs
Publication statusPublished - 2011 Nov 1

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Electrochemistry
  • Materials Chemistry

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