Electrodeposition of Metallic Lithium on a Tungsten Electrode in 1-Butyl-1-methylpyrrolidinium Bis(trifluoromethanesulfone)imide Room-temperature Molten Salt

Yasushi Katayama, Tatsuya Morita, Masaki Yamagata, Takashi Miura

Research output: Contribution to journalArticle

57 Citations (Scopus)

Abstract

Electrodeposition of metallic lithium has been investigated on a tungsten electrode in 1-butyl-1-methylpyrrolidinium bis(trifluoromethanesulfone)imide (BMPTFSI) room-temperature molten salt. It was suggested that a passivation film forms on the electrode surface as a result of the reductive decomposition of the organic cation, BMP +. The film obtained in the absence of LiTFSI seems to have no conductivity and reduced further at more negative potential. On the other hand, the film obtained in BMPTFSI containing 1 M LiTFSI seems to have Li +-conductivity and enable the deposition and dissolution of metallic lithium electrochemically. The addition of ethylene carbonate reduced the amount of electric charge required for the formation of the passivation film.

Original languageEnglish
Pages (from-to)1033-1035
Number of pages3
JournalElectrochemistry
Volume71
Issue number12
Publication statusPublished - 2003 Dec 1

Keywords

  • 1-Butyl-1-methylpyrrolidinium Bis(trifluoromethanesulfone)imide
  • Ionic liquid
  • Lithium Deposition
  • Room-temperature Molten Salt

ASJC Scopus subject areas

  • Electrochemistry

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