Electrospun N‐Doped Carbon–Carbon Nanofibers with Enhanced Porosity for High‐Performance Zinc‐Ion Hybrid Supercapacitor Application

, respectively is also obtained. After 10 000 charge-discharge cycles, the device retains 91.7% initial capacitance. Additionally, the charge storage performances of a symmetric supercapacitor (SC) and a ZIHSC, made of NC-CNFs, are compared to prove the superiority of the ZIHSC over SC. This study highlights that incorporating NC into electrospun carbon nanofibers, with potassium hydroxide (KOH) activation, yields a ZIHSC cathode material with an optimal porous 1D morphology, large SSA, optimized nanofiber diameter, and efficient heteroatom doping, leading to excellent electrochemical performance.