Studies of the interface between lithium electrodes and polymeric electrolyte systems using in situ FTIR spectroscopy

O. Chusid, Y. Gofer, D. Aurbach, M. Watanabe, Toshiyuki Momma, Tetsuya Osaka

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

This paper describes studies of the interface between lithium electrodes and solid electrolyte systems using in situ FTIR spectroscopy in a single internal reflectance mode. In this method, the masking effect of the electrolyte matrix components is largely avoided. We studied gel electrolytes based on polyvinylidene difluoride-hexafluoropropylene with cyclic alkyl carbonates as plasticizers, suitable for ambient temperatures, and a solvent free polymer, derivatives of polyethylene oxide (PEO) with a branched structure: poly[ethyleneoxide-2-(2-methoxyethoxy)ethyl glycidyl ether] at elevated temperatures. We found that the surface chemistry of Li electrodes in contact with the gel matrixes is dominated by alkyl carbonate solvent reduction to ROCO2Li surface species. In the case of the PEO-based polymer, the surface reactions of Li electrodes are dominated by salt and trace water reduction. The polymer itself seems to be stable with lithium even at 60°C.

Original languageEnglish
Pages (from-to)632-636
Number of pages5
JournalJournal of Power Sources
Volume97-98
DOIs
Publication statusPublished - 2001 Jul

Fingerprint

Lithium
Electrolytes
Polymers
lithium
Carbonates
electrolytes
Spectroscopy
Polyethylene oxides
Electrodes
electrodes
polyethylenes
carbonates
polymers
Gels
gels
spectroscopy
difluorides
Plasticizers
plasticizers
oxides

Keywords

  • Combed-branched PEO-based polymers
  • Gel electrolytes
  • In situ FTIR spectroscopy
  • Li electrodes
  • SIR mode

ASJC Scopus subject areas

  • Electrochemistry
  • Fuel Technology
  • Materials Chemistry

Cite this

Studies of the interface between lithium electrodes and polymeric electrolyte systems using in situ FTIR spectroscopy. / Chusid, O.; Gofer, Y.; Aurbach, D.; Watanabe, M.; Momma, Toshiyuki; Osaka, Tetsuya.

In: Journal of Power Sources, Vol. 97-98, 07.2001, p. 632-636.

Research output: Contribution to journalArticle

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