2010 Volume 78 Issue 5 Pages 336-338
In this study, we investigated the electrochemical behavior of various types of activated carbons with different properties, such as the specific surface area and pore size distribution in an electrolyte containing TEA-BF4 and in that containing a spiro-type quaternary ammonium salt (SBP-BF4). EDLC cells using 1 M SBP-BF4/DMC+PC showed higher capacitances for the various activated carbons and good rate capabilities even for an activated carbon with a small pore size distribution compared to EDLC cells using 1 M TEA-BF4/PC. These results may be attributed to the higher mobility of SBP with a smaller cation size and the lower viscosity of 1 M SBP-BF4/DMC+PC due to the addition of DMC.