Functionalized Graphene Hydrogel‐Based High‐Performance Supercapacitors

Functionalized graphene hydrogels are prepared by a one-step low-temperature reduction process and exhibit ultrahigh specific capacitances and excellent cycling stability in the aqueous electrolyte. Flexible solid-state supercapacitors based on functionalized graphene hydrogels are demonstrated with superior capacitive performances and extraordinary mechanical flexibility. Electrochemical energy storage is a key enabling technology for clean and sustainable mobile energy supply.1-3 In this regard, electrochemical supercapacitors have recently received considerable attention for their potential applications in areas such as electric vehicles, mobile electronic products, and uninterrupted power supply.4-6…