Synergizing Multi‐Chemisorption Sites and Micropore Confinement in Porous Carbon for High‐Performance Zinc‐Ion Hybrid Capacitors

ABSTRACT Aqueous zinc‐ion hybrid capacitors (ZICs) bridge the gap between high‐energy batteries and high‐power supercapacitors, yet their performance is fundamentally bottlenecked by the micropore confinement effect in carbon cathodes, which restricts hydrated Zn 2+ transport and active site utilization. This design synergistically optimizes pore accessibility to accommodate bulky hydrated ions and introduces abundant heteroatom‐derived chemisorption sites. Coupled with in situ characterizations, density functional theory calculations elucidate that the P/N co‐doping modulates the electronic structure and lowers Zn 2+ adsorption barriers, thereby accelerating reaction kinetics. Consequently, the cathode delivers a high reversible capacity of 136 mAh g −1 and exceptional rate capability. The assembled ZIC device achieves a remarkable energy density of 126 Wh kg −1 and a power density of 10 kW kg −1 , maintaining 85.7% capacity retention over 50,000 cycles. This work offers a sustainable, scalable pathway to dismantle kinetic barriers in aqueous energy storage.