Lithium bis(fluorosulfonyl)imide-PYR sub(14TFSI ionic liquid electrolyte compatible with graphite)

Lithium bis(fluorosulfonyl)imide (LiFSI) in 1-butyl-1-methylpyrrolidinium bis(trifluoromethanesulfonyl)imide (PYR sub(14TFSI) was successfully tested as an electrolyte for graphite composite anodes at elevated temperature of 55 [deg]C. The graphite anode showed a good cyclability during the galvanos...

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Bibliographic Details
Published inJournal of power sources Vol. 196; no. 18; pp. 7700 - 7706
Main Authors Nadherna, Martina, Reiter, Jakub, Moskon, Joze, Dominko, Robert
Format Journal Article
LanguageEnglish
Published 15.09.2011
Subjects
Anodes
Electrodes
Electrolytes
Electrolytic cells
Graphite
Ionic conductivity
Lithium
Lithium batteries
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ISSN0378-7753
DOI10.1016/j.jpowsour.2011.04.033

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Summary:Lithium bis(fluorosulfonyl)imide (LiFSI) in 1-butyl-1-methylpyrrolidinium bis(trifluoromethanesulfonyl)imide (PYR sub(14TFSI) was successfully tested as an electrolyte for graphite composite anodes at elevated temperature of 55 [deg]C. The graphite anode showed a good cyclability during the galvanostatic testing at C/10 rate and 55 [deg]C with the capacity close to theoretical. The formation of SEI in different electrolytes was the subject of study using impedance spectroscopy on symmetrical cells containing two lithium electrodes. The 0.7 m LiFSI in PYR) sub(1)4TFSI exhibits a good ionic conductivity (5.9 mS cm[super]-1 at 55 [deg]C) along with high electrochemical stability and high thermal stability. These properties allow their potential application in large-scale lithium ion batteries with improved safety.
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ISSN:0378-7753
DOI:10.1016/j.jpowsour.2011.04.033