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Optica Publishing Group
  • Applied Spectroscopy
  • Vol. 55,
  • Issue 9,
  • pp. 1131-1137
  • (2001)

Raman Microscopy Applied to Rechargeable Lithium-Ion Cells - Steps Towards in Situ Raman Imaging with Increased Optical Efficiency

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Abstract

Important improvements have been made in an <i>in situ</i> Raman cell developed to monitor the processes of lithium intercalation into the carbon and metal oxide materials used in lithium-ion cells. By reducing the electrolyte gap in the cell and changing the optical arrangement, the signal-to-noise ratio could be improved by a factor of about 20. The optimized cell gives optical access to either electrode (anode or cathode) employed in commercial lithium-ion batteries. The optical efficiency is such that Raman maps of electrode surface segments can be recorded under <i>in situ</i> conditions with an acquisition time of about 30 s per spectrum.

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