Noritoshi Nambu, Ryo-suke Takahashi, Keita Suzuki
Oct 5, 2013
Citations
0
Influential Citations
12
Citations
Journal
Electrochemistry
Abstract
The use of tetramethylammonium ions (TMA+) at moderately high concentrations of the electrolytes can increase the number of ions accumulated in pores of an activated carbon electrode and bring about high capacitance of an electric double-layer capacitor (EDLC). The solubility of tetramethylammonium difluoro(oxalato)borate (TMADFOB) in propylene carbonate (PC) was 2.0M (M = moldm−3) or more. The maximal ionic conductivity of a TMADFOB solution in PC was observed at about 1.6M at 25°C. The increase in the concentration of the electrolyte resulted in the increase in the gravimetric capacitance. The gravimetric capacitance found for TMADFOB was slightly higher than that for triethylmethylammonium tetrafluoroborate (TEMABF4). © The Electrochemical Society of Japan, All rights reserved.