Flexible supercapacitors, crucial for wearable and flexible electronics, are limited by low charge-storing ability despite their high flexibility and electrochemical stability. A promising strategy to overcome this challenge involves introducing a redox mediator (RM) into the gel electrolyte. Our study introduces a fiber-based flexible energy storage system (f-FESS) integrated with iodine-based chemical species as a novel RM, carbon fiber-based electrodes, and a solid-state polymer-gel electrolyte. This system significantly enhances the charge storage capability of flexible supercapacitors. The f-FESS-RM exhibits an impressive charge storage capability of up to 461.8 F L–1 and 64.14 mWh L–1, which is 3.6 times higher than that of systems without RM. This enhancement is due to the additional Faradic redox reaction of iodine-based species and the electrical double-layer capacitive behavior. Furthermore, the f-FESS-RM demonstrates superior mechanical robustness under various conditions and stable performance in deionized water and base electrolytes, showcasing an advanced strategy for enhanced charge-storing ability in flexible supercapacitors.-Journal cover design by scapiens
[Scientific Journal cover design] Low-Thermal-Budget Fluorite-Structure Ferroelectrics for Future Electronic Device Applications
In article number 2100028, Jiyoung Kim, Si Joon Kim, and their team review key factors involved in developing fluorite-structure ferroelectrics
