Textile
supercapacitors are promising flexible energy-storage
devices,
and they have great potential in various wearable electronics. However,
they suffer from low electrochemical performance. Developing a rational
fiber surface structure to enhance the electron transportation, electrolyte
ion diffusion, and electroactive surface area is the most promising
strategy to address the above issue. A textile-based electrode is
developed by in situ coating the primary fiber inside
the cotton fabric with an Au metallic layer and a nanostructured conductive
metal–organic framework layer. The hierarchically porous structure,
3D conductive skeleton constructed by metal plated fabrics and conductive
active materials, high surface area, and rational interface structure
provide the electrodes with excellent synergistic effects, leading
to high specific capacitance (258 F g–1), long cycling
life, outstanding structural stability, and flexibility. A symmetrical
all-solid-state textile supercapacitor employing this electrode achieves
a high energy density of 434 μwh cm–2.
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