Soft-lithography approach for scalable micro-supercapacitor fabrication with silver nanowire-activated carbon composite

초록

Flexible micro-supercapacitors are attractive for wearable and portable electronics owing to their high-power density and durability. We report current-collector-free devices fabricated from activated carbon/silver nanowire composites patterned via a polyurethane acrylate stencil on flexible substrates. Optimizing the carbon-to-nanowire ratio yielded a balance of surface area and conductivity, achieving energy density of 5.09 mu Wh cm-2, power density of 0.304 mW cm-2, and stable capacitance retention of similar to 44% at high scan rates. The wire-type additives imparted flexibility and durability, with moderate degradation after 100 bending cycles. This scalable approach enables high-performance, flexible micro-supercapacitors for next-generation energy storage.

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