부산대학교 도서관

Integrated supercapacitor with stable electrochemical performance under complex deformations is theprospective energy storage device for wearable electronics. However, there is often a conflict betweenthe mechanical performance and the specific capacitance of the conventional conductive polymerbasedintegrated supercapacitor. In this work, a novel integrated supercapacitor based on adhesive gelelectrolyte has been prepared by physical adsorption, which not only avoids the drawbacks of the conventionalintegrated supercapacitor but also exhibits the electrode universality including powder electrodematerial. The adhesive triple network polyacrylamide/polydopamine/agar/H3PO4 gel electrolyteis fabricated with high ionic conductivity, toughness and adhesion. Based on this, the integrated supercapacitoris assembled by spraying activated carbon powder on both sides of the pre-stretched biaxiallygel electrolyte. Due to the strong interfacial adhesion, such a device exhibits low interfacial resistance andhigh specific capacitance of 155 mF/cm2 at 0.5 mA/cm2. More impressively, the capacitance retention canreach 92.4% after 10 cutting/healing cycles and even keep the brilliant self-healabillity at 20 C. Additionally, it can hold stable electrochemical performance when exposed to harsh environments. The physical adsorption strategy would offer novel inspiration for the development of integrated supercapacitorand has great practical applications in wearable and portable electronics.