Energy-efficient and eco-friendly fabrication of a quaternary co-doped porous carbon electrode material for zinc-ion hybrid capacitors via laser technology

IF 6.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Journal of Alloys and Compounds Pub Date : 2025-04-08 DOI:10.1016/j.jallcom.2025.180328

Zhenzhen Kong, Tao Xue, Shihan Cheng, Jianfeng Yu, Qifan Liu, Limin Zang, Jianhui Qiu, Jirui Li, Chao Yang

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Abstract

Porous carbon materials serve as ideal cathodes for zinc-ion hybrid capacitors (ZIHCs) owing to their hierarchically porous structure and superior electrical conductivity. However, to address the capacity mismatch between the high-capacity zinc anode and the porous carbon cathode, we enhance the charge storage performance of the carbon-based cathode through heteroatom doping and pore structure modification. In this study, a polypyrrole (PPy) precursor co-doped with phytic acid and sulfuric acid (denoted as PS-PPy) was synthesized via electrochemical polymerization on a laser-activated graphite paper (LGP) substrate. Subsequent laser carbonization of PS-PPy yielded a co-doped porous carbon material containing P, N, O, and S heteroatoms (PS-NOPC). The effects of different laser energies and sulfuric acid additions on porous carbon electrodes’ structure and electrochemical properties were investigated. Additionally, the ion storage mechanism of PS-NOPC electrodes was revealed by molecular dynamics simulation. The maximum specific capacity of ZIHCs composed of PS-NOPC cathode and zinc foil anodes in 2 M ZnSO₄ aqueous solution could reach 213.2 mAh g^-1. When assembled into flexible quasi-solid ZIHCs, it has an energy density of 144.5 Wh kg^-1 and a capacity retention of 90.3% after 10000 cycles. In addition, the device has a capacity retention of 97.0% after 600 bending cycles.

Synopsis

A green laser carbonization method was used to prepare high specific capacity heteroatom-doped porous carbon materials.

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利用激光技术制备高效环保的四元共掺杂多孔碳电极材料用于锌离子混合电容器

多孔碳材料由于其分层多孔结构和优异的导电性而成为锌离子混合电容器（zihc）的理想阴极。然而，为了解决高容量锌阳极与多孔碳阴极容量不匹配的问题，我们通过杂原子掺杂和孔结构修饰来提高碳基阴极的电荷存储性能。本研究在激光活化石墨纸（LGP）衬底上通过电化学聚合合成了植酸和硫酸共掺杂聚吡咯（PPy）前驱体（记为PS-PPy）。随后对PS-PPy进行激光碳化，得到了含有P、N、O和S杂原子的共掺杂多孔碳材料（PS-NOPC）。研究了不同激光能量和硫酸添加量对多孔碳电极结构和电化学性能的影响。此外，通过分子动力学模拟揭示了PS-NOPC电极的离子储存机理。由PS-NOPC阴极和锌箔阳极组成的zihc在2 M ZnSO4水溶液中的最大比容量可达213.2 mAh g-1。当组装成柔性准固体zihc时，其能量密度为144.5 Wh kg-1，循环10000次后容量保持率为90.3%。此外，该装置在600次弯曲循环后的容量保持率为97.0%。摘要采用绿色激光碳化法制备了高比容量杂原子掺杂多孔碳材料。

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来源期刊

Journal of Alloys and Compounds 工程技术-材料科学：综合

CiteScore

11.10

自引率

14.50%

发文量

5146

审稿时长

67 days

期刊介绍： The Journal of Alloys and Compounds is intended to serve as an international medium for the publication of work on solid materials comprising compounds as well as alloys. Its great strength lies in the diversity of discipline which it encompasses, drawing together results from materials science, solid-state chemistry and physics.