Synergistic Ultramicropore and Hierarchical Pore Engineering in Heteroatom-Doped Carbon for High-Performance Zinc-Ion Capacitors
Jiale Zhang·Zhichang Xiao·Yangbo Du·Shuaihua Zhang·Runze Gao·Xuanqi Huang·Qi Yang·Debin Kong·Ruifang Zhang
Abstract Carbonaceous zinc-ion capacitors (ZICs) offer inherent advantages for energy storage, yet the role of pore structures in enabling high zinc-ion capacitance remains underexplored. Herein, a dual-molten-salt regulation strategy is employed to derive N/O/S-doped porous carbon nanomaterials, achieving a high specific surface area (SSA) of 2523 m 2 g −1 with ultramicropores (< 0.86 nm) contributing 30.6% of the total SSA. Structural analyses reveal that increasing molten FeCl 3 content yi