Molten Salt Construction of Nitrogen, Oxygen, Sulfur Co‐Doped Hierarchical Porous Carbon for Zinc Ion Hybrid Capacitors

• DOI: 10.1002/adsu.202401000
• Publication Date: 2025-02-11T06:53:20Z
• Authors: Yifeng Liu; Weijian Chen; Xinyang Zhang; Baipei Liu; Yande Liu; Rui Lu; Xiaoliang Wu
• Keywords: Carbon fibers

Abstract Heteroatoms doped hierarchical porous carbon shows great potentiality as electrode materials for zinc ion hybrid capacitors. Herein, nitrogen, oxygen, and sulfur co‐doped (NSPC) is synthesized by one‐step pyrolysis of the mixture KHCO 3 , starch, acesulfame potassium. The obtained NSPC‐700 samples possess 3D interconnected architecture, high specific surface area, rich functional groups. Result from synergistic effect, a capacitance 382 F g −1 at 0.5 A outstanding electrochemical stabilization with retention 101.5%. Density theory (DFT) results show that co‐doping N, O, S can improve adsorption capacity ions enhance charge transfer rate. assembled Zn//ZnSO 4 (aq)//NSPC‐700 capacitor achieves an energy density 120.84 Wh kg power 100 W excellent (90.9% after 10,000 cycles).