Development of In Situ Infrared Spectroelectrochemical Techniques: Application to Lithium Intercalation Reactions in Electrode Materials

Abstract

We developed an in situ IR transmission electrochemical cell, which was initially used to study lithium intercalation in a phospho-olivine LixFePO4 cathode. We had previously characterized vibrational spectrum of this material as part of a preliminary study. The transition between LiFePO4 and FePO4 could easily be followed in the in situ spectra. An industrially available coin cell was modified to facilitate routine in situ Raman measurements of lithium batteries. Available in situ Raman cells are usually designed to optimize optical throughput, resulting in cell geometries significantly different from those used in "normal" electrochemical investigations. The charge/discharge curves of our cell were very similar to those of unmodified coin cells. This cell was used to study lithium intercalation in a lithium vanadium pentoxide cathode.

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Document Details

Document Type
Technical Report
Publication Date
Oct 09, 2007
Accession Number
ADA482348

Entities

People

  • Roger Frech

Organizations

  • University of Oklahoma

Tags

DTIC Thesaurus Topics

  • Cells
  • Diffraction
  • Electrochemical Cells
  • Electrodes
  • Geometry
  • Lithium Batteries
  • Materials
  • Measurement
  • Spectra
  • Throughput
  • Transitions
  • Vanadium
  • Vibrational Spectra
  • Wave Phenomena

Fields of Study

  • Materials science

Readers

  • Battery Technology and Engineering
  • Electrochemical Surface Science
  • Materials Science and Engineering.