Hybrid nitrogen-doped graphene-supported MoS2 nanosheets with synergistic effect for high-performance supercapacitor electrodes

IF 2.3 4区材料科学 Q2 MATERIALS SCIENCE, CERAMICS

Journal of Sol-Gel Science and Technology Pub Date : 2025-04-22 DOI:10.1007/s10971-025-06762-0

Nithyialakshmi Ravindran, M. Sookhakian, Goh Boon Tong, Y. Alias

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Abstract

Efficient supercapacitor electrodes have been developed from a nitrogen-doped graphene-molybdenum disulfide composite (NG/MoS₂) with varying NG concentrations fabricated on nickel foil electrodes. The successful synthesis of NG and MoS₂ nanosheets was confirmed through Raman spectroscopy, X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). At the same time, the morphology was studied using FESEM and TEM. The influence of varying NG concentrations on the electrochemical properties of the MoS₂ nanosheets was investigated. The composite containing 1% NG achieved a maximum specific capacitance of 897.6 F/g at a current density of 1 A g⁻¹, surpassing the electrochemical performance of pristine MoS₂, which had a capacitance of 291.1 F/g under the same conditions. This improvement arises from the synergistic interaction between superior catalytic properties found in the MoS₂ nanosheets and conductivity provided by the addition of NG, which was confirmed through electrochemical impedance spectroscopy (EIS). In conclusion, this work may offer a way to fabricate supercapacitor electrodes with improved specific capacitance and energy density for energy storage.

Graphical Abstract

查看原文本刊更多论文

具有协同效应的氮掺杂石墨烯负载MoS2纳米片用于高性能超级电容器电极

在镍箔电极上制备不同浓度的氮掺杂石墨烯-二硫化钼复合材料（NG/MoS2），开发出高效的超级电容器电极。通过拉曼光谱、x射线衍射（XRD）和x射线光电子能谱（XPS）证实了NG和MoS2纳米片的成功合成。同时利用FESEM和TEM对其形貌进行了研究。研究了不同浓度NG对二硫化钼纳米片电化学性能的影响。含1% NG的复合材料在电流密度为1 a g−1时的最大比电容为897.6 F/g，超过了相同条件下原始MoS2的291.1 F/g的电化学性能。这种改进是由于二硫化钼纳米片优越的催化性能与添加NG所提供的电导率之间的协同作用，这一点通过电化学阻抗谱（EIS）得到了证实。总之，这项工作可能为制造具有更高比电容和能量密度的超级电容器电极提供一种方法。图形抽象

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来源期刊

Journal of Sol-Gel Science and Technology 工程技术-材料科学：硅酸盐

CiteScore

4.70

自引率

4.00%

发文量

280

审稿时长

2.1 months

期刊介绍： The primary objective of the Journal of Sol-Gel Science and Technology (JSST), the official journal of the International Sol-Gel Society, is to provide an international forum for the dissemination of scientific, technological, and general knowledge about materials processed by chemical nanotechnologies known as the "sol-gel" process. The materials of interest include gels, gel-derived glasses, ceramics in form of nano- and micro-powders, bulk, fibres, thin films and coatings as well as more recent materials such as hybrid organic-inorganic materials and composites. Such materials exhibit a wide range of optical, electronic, magnetic, chemical, environmental, and biomedical properties and functionalities. Methods for producing sol-gel-derived materials and the industrial uses of these materials are also of great interest.