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电容相对较低的阳极材料是非对称超级电容器实现高能量密度所面临的主要挑战之一.采用原位电化学沉积法成功制备了硫掺杂氧化铁(S-FeOOH)纳米片电极，并探讨了硫掺杂对电极材料电化学性能的影响.实验结果表明，硫掺杂能够诱导FeOOH从聚集颗粒转变为相互连接的纳米片结构，从而显著提升电子/离子传输效率和循环稳定性.在电流密度为5 mA·cm-2且活性物质负载量为2.5 mg·cm-2的条件下，S-FeOOH电极表现出1 700 mF·cm-2的面积比电容和680 F·g-1的质量比电容.当电流密度从5 mA·cm-2增加至400 mA·cm-2时，该电极仍可保持初始电容值的71%.此外，在30 000次恒电流充放电测试后，S-FeOOH电极展现出良好的结构稳定性和高达90%的电容维持率，证明其具有优异的电化学循环稳定性.
Abstract：One of the primary challenges in achieving high energy density in asymmetric supercapacitors is the relatively low capacitance of anode materials. In this study,S-doped iron oxide(S-FeOOH) nanosheets electrode was successfully synthesized via electrochemical deposition,and the influence of sulfur doping on the electrochemical performance of the electrode material was systematically investigated.The experimental results indicate that sulfur doping can induce FeOOH to transform from aggregated particles into interconnected nanosheet structures,thereby significantly enhancing electron/ion transport efficiency and cyclic stability.This effectively addresses the intrinsic issues of iron oxide-based electrode materials,such as poor electron/ion transport efficiency and inadequate cycling stability.At a current density of 5 mA·cm-2 and an active material loading of 2.5 mg·cm-2,the S-FeOOH electrode demonstrates an area-specific capacitance of 1 700 mF·cm-2 and a mass-specific capacitance of 680 F·g-1. When the current density increases from 5 mA·cm-2 to 400 mA·cm-2,the electrode retains 71% of its initial capacitance value.Furthermore,after 30 000 cycles of galvanostatic charge-discharge testing,the S-FeOOH electrode exhibits excellent structural stability with a capacitance retention rate of up to 90%,confirming its superior electrochemical cycling stability.
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基本信息:
DOI：10.20212/j.issn.1008-2441.2025.04.010
中图分类号:O646;TB383.1;TM53
引用信息:
[1]孙震,王海旭,罗维巍,等.硫掺杂FeOOH纳米片阳极电化学性能研究[J].鞍山师范学院学报,2025,27(04):64-70.DOI:10.20212/j.issn.1008-2441.2025.04.010.
基金信息:
辽宁省教育厅项目（JYTMS20231703）; 鞍山师范学院科研项目（22B12,23KYXM027）
2025-03-08
2025
2025-04-09
2025-04-10
2025
1
2025-08-13
2025-08-13