Lithium bis(fluorosulfonyl)imide-PYR14TFSI ionic liquid electrolyte compatible with graphite

0481501 - ÚACH 2018 RIV NL eng J - Journal Article
Nádherná, Martina - Reiter, Jakub - Moškon, J. - Dominko, R.
Lithium bis(fluorosulfonyl)imide-PYR14TFSI ionic liquid electrolyte compatible with graphite.
Journal of Power Sources. Roč. 196, č. 18 (2011), s. 7700-7706. ISSN 0378-7753. E-ISSN 1873-2755
R&D Projects: GA AV ČR(CZ) KJB200320801; GA AV ČR KJB200320901; GA MŠMT(CZ) LC523
Institutional research plan: CEZ:AV0Z40320502
Keywords : Graphite * Ionic liquid * Bis(fluorosulfonyl)imide * Lithium-ion battery * Solid electrolyte interface
OECD category: Inorganic and nuclear chemistry
Impact factor: 4.951, year: 2011

Lithium bis(fluorosulfonyl)imide (LiFSI) in 1-butyl-1-methylpyrrolidinium bis(trifluoromethanesulfonyl)imide (PYR14TFSI) was successfully tested as an electrolyte for graphite composite anodes at elevated temperature of 55 degrees C. The graphite anode showed a good cyclability during the galvanostatic testing at C/10 rate and 55 degrees 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 0.7m LiFSI in PYR14TFSI exhibits a good ionic conductivity (5.9 mS cm(-1) at 55 degrees 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.
Permanent Link: http://hdl.handle.net/11104/0277719