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人工晶体学报 ›› 2026, Vol. 55 ›› Issue (6): 972-980.DOI: 10.16553/j.cnki.issn1000-985x.xb2026.0012

• 研究论文 • 上一篇    

浓度调控对NiCo2S4/石墨烯气凝胶电化学性能的影响

李博霞1,2(), 王晓敏3   

  1. 1.兰州工业学院材料工程学院,兰州 730050
    2.甘肃省绿色再制造与新材料工程研究中心,兰州 730050
    3.太原理工大学材料科学与工程学院,太原 030024
  • 收稿日期:2026-01-26 出版日期:2026-06-20 发布日期:2026-07-07
  • 作者简介:李博霞(1994—),女,甘肃省人,讲师。E-mail:1508583005@qq.com

Effect of Concentration Regulation on Electrochemical Properties of NiCo2S4/Graphene Aerogel Composites

LI Boxia1,2(), WANG Xiaomin3   

  1. 1.School of Materials Engineering,Lanzhou Institute of Technology,Lanzhou 730050,China
    2.Gansu Green Remanufacturing and New Materials Engineering Research Center,Lanzhou 730050,China
    3.College of Materials Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,China
  • Received:2026-01-26 Online:2026-06-20 Published:2026-07-07

摘要: 本研究采用水热法,通过调控镍钴盐等原料的比例,制备出具有自支撑结构的镍钴硫化物/石墨烯气凝胶(NiCo2S4/GA)复合材料。运用X射线衍射(XRD)、扫描电子显微镜(SEM)等表征技术及电化学工作站对复合材料的结构、微观形貌和电化学性能展开研究。结果表明,在反应物摩尔浓度比为1∶1的样品(NiCo2S4/GA-1∶1)中,NiCo2S4纳米颗粒呈现高密度均匀负载状态且无团聚现象,面积比电阻为1.99 Ω·cm2;在2 A·g-1的电流密度下循环1 500次后,电容保持率为70.1%。电化学动力学分析表明,NiCo2S4/GA-1∶1复合电极表现为由扩散效应主导的赝电容行为,这主要得益于石墨烯气凝胶的多孔结构,以及石墨烯片层在储能过程中对NiCo2S4电容效应的优化作用,使二者之间产生了协同效应。因此,NiCo2S4/GA-1∶1复合材料作为超级电容器电极材料具有较大的应用潜力。

关键词: NiCo2S4/GA复合材料; 水热法; 自支撑结构; 反应物摩尔浓度; 纳米颗粒; 协同效应

Abstract: In this study,the nickel cobalt sulfide/graphene aerogel (NiCo2S4/GA) composites with a self-supporting structure were successfully prepared by a hydrothermal method through adjusting the ratio of raw materials such as nickel cobalt salts. The structure,micromorphology and electrochemical properties of the composites were comprehensively investigated by X-ray diffraction (XRD),scanning electron microscopy (SEM) and other characterization techniques,together with an electrochemical workstation. The results show that in the sample (NiCo2S4/GA-1∶1) with a reactant molar concentration ratio of 1∶1,NiCo2S4 nanoparticles are loaded uniformly with high density without agglomeration,the area-specific resistance is 1.99 Ω·cm2. The capacitance retention rate reaches 70.1% after 1 500 cycles at a current density of 2 A·g-1. Electrochemical kinetic analysis reveals that the NiCo2S4/GA-1∶1 composite electrode exhibits pseudocapacitive behavior dominated by diffusion effects. This phenomenon is mainly attributed to the porous structure of graphene aerogel,as well as the optimization of graphene nanosheets on the capacitive performance of NiCo2S4 during the energy storage process,which thus endows the composite with a distinct synergistic effect. Thus,NiCo2S4/GA-1∶1 composite has great application potential as electrode material for supercapacitors.

Key words: NiCo2S4/GA composite; hydrothermal method; self-supporting structure; reactant molar concentration; nanoparticles; synergistic effect

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