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

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 decompos...

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Bibliographic Details
Published in:Denki kagaku oyobi kōgyō butsuri kagaku 2003/12/05, Vol.71(12), pp.1033-1035
Main Authors: KATAYAMA, Yasushi, MORITA, Tatsuya, YAMAGATA, Masaki, MIURA, Takashi
Format: Article
Language:English
Subjects:
1-Butyl-1-methylpyrrolidinium Bis(trifluoromethanesulfone)imide
Ionic liquid
Lithium Deposition
Room-temperature Molten Salt
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Summary: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.
ISSN:1344-3542
2186-2451
DOI:10.5796/electrochemistry.71.1033