Abstract
? 2022 Elsevier B.V.A great deal of attention has been paid to flexible energy storage devices in recent years, but it remains a challenge to obtain integratable 1D energy storage devices with high specific capacitance and mechanical flexibility that can operate normally under common extrusion, bending, and tensile deformations. Herein, a flexible 1D yarn-shaped supercapacitor (YSC) was constructed based on Polypyrrole (PPy) @NiCo-layered double hydroxide (LDH) @stainless steel yarn (SSY) electrode prepared by facile hydrothermal and electrochemical deposition method. The as-obtained PPy@NiCo-LDH@SSY electrode exhibited an enhanced specific capacitance of 1196 F g?1 at 1 A g?1, owing to the synergistic impact of electroactive materials as well as the stratified core-shell structure. The electrospun separator automatically ensured the regular operation of the YSC device throughout use. Moreover, the YSC exhibited an energy density of 6.6 mWh cm?3 at the power density of 159.2 mW cm?3 and outstanding cycle performance (about 85.7% after 10 000 cycles). In addition, the YSC still maintained high electrochemical performance under different bending angles. The low cost, excellent overall performance and scalability make YSC a promising flexible wearable energy storage device.
NSTL
Elsevier