摘要
Stretchable supercapacitors(S-SCs)are of considerable interest as prospective energy-storage devices for wearable electronics and smart products.However,achieving high energy density and stable output under large deformations remains an urgent challenge.Here,we develop a high-performance S-SC based on a robust heterostructured graphene–polyaniline(G-PANI)anchored hierarchical fabric(G-PANI@pcPU).By precisely manipulating centrifugal electrospinning and PANI-induced two-step self-assembly process,the G-PANI@pcPU features an inter-linkage porous backbone,which open ions migration/intercalation pathways,high mechanical flexibility(elongation:400%),and large production area(>90 cm^(2)).The resultant G-PANI@pcPU presents ultra-large specific areal capacitance(Careal)of 5093.7 mF cm^(-2)(about 35 mg cm^(-2)mass loading of G-PANI)and redox reversibility in 1 M H_(2)SO_(4) electrolyte.Additionally,the G-PANI@pcPU fabric-based solid-state S-SCs show a high energy density of 69.2μWh cm^(-2)and capacitance of 3113.7 mF cm^(-2).More importantly,the superior stretchable stability(84.1%capacitance retentions after 5000 cycles)and foldable performance(86.7%capacitance retentions after 5000 cycles)of S-SCs are impressively achieved.Finally,the S-SCs realize potential applications of steady powering light-emitting diode(LED)lights at 100%strain,smart watch at bending deformation,toy car,and lamp.This work can offer an overwhelming foundation for designing advanced flexible electrodes toward new energy and smart wearable applications.
基金
support from the National Natural Science Foundation of China(22278378,51133006)
Natural Science Foundation of Jiangsu Province(BK20211592)
Science Foundation of Zhejiang Sci-Tech University(22212011-Y).
