EQCM Studies on the Effect of Anti-freezing Additives on the Storage Behavior of Ions at Activated Carbon Electrodes in NaClO4 Aqueous Solutions†

Abstract

Electrochemical quartz crystal microbalance(eqcm) was used to investigate the adsorption of na+ into the micropores of activated carbon in 5 mol/l naclo4 +x mol/l meoh and 5 mol/l naclo4 +x mol/l etoh aqueous solutions. molecule numbers of methanol or ethanol associated with each na+ at the interfaces were estimated. the results show that methanol and ethanol are adsorbed into the micropores together with na+ the higher the concentration of methanol and ethanol in bulk solutions was, the more molecule numbers of methanol or ethanol associated with each na+ adsorpted into the pores of activated carbon; methanol and ethanol adsorpted into the pores occupied some space of the micropores and lowered the dielectric constant of the double layers, thus suppressed the specific capacitance of maxsorb negative electrodes.