The Influence of Pre-Treatment Methods of Electrode Material Onaluminum current Collector for EDLC

[...]environmental problems arise, and therefore, there is a great demand for the use of renewable energy and a corresponding need for an energy storage device1,2. [...]it is not only well known in EDLC industry that as the voltage gets higher, there is more deterioration from the reaction between the electrolyte and the activated carbon13, also serious corrosion occurs in the Al current collector due to the reaction with the electrolyte at the voltage limit and higher. [...]studies on improving energy density by raising the typical EDLC operating voltage of 2.5-2.7V must be accompanied by studying the aluminum corrosion in EDLC. [...]it was confirmed that the physical polishing method has an effect of reducing the amount of the chemical component on the surface of the Al current collector changed by the deterioration with the electrolyte (Table 1). [...]of analyzing the effect of electrode active material removal methods on Al current collector, ultrasonic treatment within 60 seconds and heat treatment method which does not include water have little effect on the chemical composition or pit change of the Al current collector.