Morpholinium-based ionic liquid mixtures as electrolytes in electrochemical double layer capacitors

作者：Galinski Maciej^*; Stepniak Izabela

来源：Journal of Applied Electrochemistry, 2009, 39(10): 1949-1953.

DOI：10.1007/s10800-009-9904-4

• Room temperature ionic liquid
• Morpholinium ionic liquid
• Electrolyte conductivity
• Electrochemical double layer capacitor (EDLC)

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).

• 出版日期2009-10