In situ observation of lithium deposition processes in solid polymer and gel electrolytes

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Abstract

Deposition processes of lithium in solid polymer [poly(ethylene oxide) (PEO)8 + LiClO4] and gel [PEO8 + propylene carbonate(PC) + LiClO4] electrolytes, as well as in the liquid (PC + LiClO4) one, were observed in situ using an optical microscope and their difference is discussed. It was confirmed that the dendritic growth of lithium, which appeared in the liquid electrolyte, is suppressed in the solid polymer due to the immobility of the electrolyte molecules, although non-uniform coverage of the cathode was observed because of its low conductivity. In contrast, the gel electrolyte possessed advantages of both the liquid and solid electrolytes, resulting in a smooth and uniform deposition in the current density region up to 2.0mAcm-2.

Original languageEnglish
Pages (from-to)153-156
Number of pages4
JournalJournal of Electroanalytical Chemistry
Volume421
Issue number1-2
DOIs
Publication statusPublished - 1997 Jan 30

Keywords

  • Dendritic growth
  • In situ observation
  • Lithium secondary battery

ASJC Scopus subject areas

  • Analytical Chemistry
  • Chemical Engineering(all)
  • Electrochemistry

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