Liquid electrolytes based on new lithium conductive imidazole salts

Leszek Niedzicki , Marta Kasprzyk , K. Kuziak , Grażyna Żukowska , Marek Marcinek , Władysław Wieczorek , M. Armand

Abstract

In the present paper new generation of imidazole-derived lithium salts (LiTDI—lithium 4,5-dicyano-2-(trifluoromethyl)imidazolide, LiPDI—lithium 4,5-dicyano-2-(pentafluoroethyl)imidazolide and LiHDI—lithium 4,5-dicyano-2-(n-heptafluoropropyl)imidazolide) applied in a model liquid electrolyte, with propylene carbonate used as a solvent, is described. Room temperature ionic conductivities measured by Impedance Spectroscopy are as high as 10−2 to 10−3 S cm−1 for the 0.1–1 mol dm−3 salt concentration range. Lithium cation transference numbers calculated using the Bruce–Vincent method exceed 0.4 at salt concentration equal to 1 mol dm−3. Interface resistance measurements showed good stability at high—0.5 mol dm−3 or low—0.01 mol dm−3 salt concentrations. Ionic associations were estimated using Fuoss–Kraus semiempirical method revealing relatively low association rates. The effect of anion structure on ionic interactions and electrochemical characteristics of the studied electrolytes is discussed.
Author Leszek Niedzicki KChNTCS
Leszek Niedzicki,,
- Chair Of Inorganic Chemistry And Solid State Technology
, Marta Kasprzyk KChNTCS
Marta Kasprzyk,,
- Chair Of Inorganic Chemistry And Solid State Technology
, K. Kuziak
K. Kuziak,,
-
, Grażyna Żukowska KChNTCS
Grażyna Żukowska,,
- Chair Of Inorganic Chemistry And Solid State Technology
, Marek Marcinek KChNTCS
Marek Marcinek,,
- Chair Of Inorganic Chemistry And Solid State Technology
, Władysław Wieczorek KChNTCS
Władysław Wieczorek,,
- Chair Of Inorganic Chemistry And Solid State Technology
, M. Armand
M. Armand,,
-
Journal seriesJournal of Power Sources, ISSN 0378-7753
Issue year2011
Vol196
No3
Pages1386-1391
Publication size in sheets0.5
Keywords in EnglishConductivity, Interfacial stability, Lithium electrolytes, Lithium salts, Transference number
DOIDOI:10.1016/j.jpowsour.2010.08.097
URL http://www.sciencedirect.com/science/article/pii/S037877531001582X
Languageen angielski
File
Journal of Power Sources.pdf 331.93 KB
Score (nominal)40
Publication indicators WoS Impact Factor [Impact Factor WoS]: 2011 = 4.951 (2) - 2011=5.006 (5)
Citation count*27 (2015-05-10)
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