Study of Supercapacitor Performance Degradation Depending on Oxide Layer of Aluminum Current Collector

Abstract

Supercapacitor performance comparison depending on the various oxide film thickness of aluminum foil was studied. The study was focused on the anodic behavior of organic solvent based cylindrical supercapacitor.The study aimed to see correlation between the active material current collector interface changes and the performance of the supercapacitor such as capacitance, ESR or gas generation depending on varying Al current collector oxidation pre-treatment. The results of performance test showed that electrode degradation of the interface between active material coating layer and the Al current collector are influenced by the oxidation pre-treatment process. Furthermore, the supercapacitor performance test by using long time period stored Al foil as a current collector (which is naturally oxidized at room temperature) was conducted to see how long the Al foil for supercapacitor can be stored without notable performance degradation.