Journal
JOURNAL OF APPLIED ELECTROCHEMISTRY
Volume 39, Issue 10, Pages 1949-1953Publisher
SPRINGER
DOI: 10.1007/s10800-009-9904-4
Keywords
Room temperature ionic liquid; Morpholinium ionic liquid; Electrolyte conductivity; Electrochemical double layer capacitor (EDLC)
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Funding
- KBN [31-1240/T08/2005]
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Butyl-Methyl-Morpholinium bis(trifluoromethanesulphonyl)imide [ButMetMor][TFSI] and Ethyl-Methyl-Morpholinum bis(trifluoromethanesulphonyl)imide [EtMetMor][TFSI] and their mixtures with propylene carbonate (PC) were investigated as potential electrolytes in an electrochemical double layer capacitor (EDLC). Temperature dependencies of conductivity and electrochemical stability windows of ionic liquids (ILs) as well as their mixtures were determined. PC mixtures give higher conductivity with maximum ca. 1:4 (IL:PC) molar rate. Temperature dependencies of conductivity follow the Arrhenius type, showing higher energy activation for neat ILs rather than for mixtures. The EDLC was constructed based on activated carbon cloth (ACC, Kynol(A (R))) ca. 2000 m(2) g(-1) and IL:PC mixture giving specific capacitance of ca. 100-120 F g(-1).
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