N, S–Codoped Hyper-Cross-Linked Polymers Blended with Polyacrylonitrile via Electrospinning as Precursors for High-Performance Carbon Nanofiber Supercapacitor

. Moreover, it retains 88.7% of its capacitance performance after 10,000 charge-discharge cycles. This porous carbon nanofiber membrane not only eliminates the need for binders required by traditional powder electrode materials but can also be directly used as a flexible electrode, demonstrating significant application potential in the field of flexible energy storage devices.