Layered double hydroxides loaded on pore-engineered carbon nanofibers and applied to flexible energy storage devices

Driven by the growing demand for flexible wearable electronics, this study develops a freestanding porous carbon nanofiber electrode modified with layered double hydroxides through electrospinning and etching. The designed electrode simultaneously achieves high energy storage and exceptional electromagnetic wave absorption. When assembled in asymmetric supercapacitors, it delivers 47.5 Wh kg⁻¹ at 750 W kg⁻¹ with 84.3 % capacity retention after 10,000 cycles. As a Zn-ion hybrid supercapacitor, it reaches 116.3 Wh kg⁻¹ at 75 W kg⁻¹, while also exhibiting a strong absorption performance with a reflection loss of −58.8 dB. This work breaks the conventional performance trade-off and provides a new design strategy for multifunctional energy devices.