An advanced structure capable of hosting large electrochemical activity with desired balance in ion diffusion kinetics, faradic charge storage, and robust stability is the key to developing high-performance fabric-based electrochemical supercapacitors (FSCs). Herein, we develop a hierarchical multimetal oxides@graphene fabric (Cu-MO@GFF) as a supercapacitor electrode with accelerated ionic diffusion, adsorption energy, faradic redox reaction kinetics, and electrochemical reversibility. As a result, the Cu-MO@GFF presents excellent mass capacitance (534 F g), high rate performance (266 F g at 10 A g), and good cycle performance (96.9% capacitive retention after 20,000 cycles) in 6 mol L (M) KOH electrolyte. In addition, the Cu-MO@GFF-based solid-state FSC delivers excellent energy density (11.875 Wh kg), much-improved cyclic stability, and bending capability. On account of the excellent electrochemical behavior, this solid-state FSC can flexibly power various wearable devices (such as luminous tags, bracelets, and wearable watches), which will offer a new avenue for innovating next-generation wearable energy devices.
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