Presentation Information
[11a-A24-9]High-speed laser fabrication of electrodes for supercapacitors
Lingaraj Pradhan1, 〇Takashi Nakajima1 (1.Kyoto University)
Keywords:
supercapacitor,electrode,laser fabrication
Energy storage technologies are becoming increasingly important as global energy demand grows and large-scale renewable energy deployment progresses. Rechargeable batteries store and release electricity through redox reactions at the electrodes, whereas supercapacitors store and release energy via physical adsorption and desorption of charges on the electrode surface, together with pseudocapacitance associated with redox reactions, depending on the type. Although supercapacitors resemble conventional capacitors, their electrodes possess an electrode surface area several orders of magnitude larger than that of flat capacitor electrodes, resulting in a charge storage capacity that is also larger by several orders of magnitude. Compared with rechargeable batteries, which exhibit high energy density but suffer from pronounced degradation due to repeated redox reactions, supercapacitors feature relatively low energy density but offer high power density and excellent cycle durability. Note that the electrodes in these devices are typically fabricated by wet-chemical methods. In this study we demostrate the high-speed fabrication of supercapacitor electrodes using a laser, and evaluate its performance.