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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 33, Number 9
BKCSDE 33(9)
September 20, 2012 


Ionic Liquids Containing 1,1-Dicyano-1-acetylmethanide Anion as Potential Electrolytes

Haryo Pandu Winoto, Shalu Agarwal, Jin Kyu Im, Minserk Cheong, Je Seung Lee*
Ionic liquid, Electrolyte, Ionic conductivity, Specific capacitance
Various types of room temperature ionic liquids (RTILs) containing 1,1-dicyano-1-acetylmethanide anion ([C(CN)2(COCH3)]−, [DCNAcC]−) were prepared and their physical and electrochemical properties were studied. All of these ILs exhibited high thermal stabilities over 200 oC and relatively high ionic conductivities up to 29.4 mS cm−1 at 80 oC. Although the ionic conductivity of IL containing bis(trifluoromethanesulfonyl)- imide ([Tf2N]−) anion is higher than that of ILs bearing [DCNAcC]− anion, the specific capacitance of ILs bearing [DCNAcC]− anion are higher than that of IL containing [Tf2N]− anion and showed high temperature dependence. Such favorable electrochemical properties of these ILs are likely to be attributed to the efficient dissociation of cation and anion at higher temperature and enhanced electrosorption of [DCNAcC]− anion at the electrode.
2999 - 3003
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