分级结构CuS电极材料的制备及其超级电容性能  

Preparation and Supercapacitor Performance of Hierarchical CuS Electrode Material

作　　者：包建勤 虎学梅 乔俊强 BAO Jianqin;HU Xuemei;QIAO Junqiang(Gansu Natural Energy Research Institute,Lanzhou 730046,China;Key Laboratory of Solar Energy Utilization,Gansu Province,Lanzhou 730046,China)

机构地区：[1]甘肃自然能源研究所,兰州730046 [2]甘肃省太阳能利用重点实验室,兰州730046

出　　处：《表面技术》2025年第8期210-218,共9页Surface Technology

基　　金：甘肃省重点研发计划项目(22YF7GA064)。

摘　　要：目的 CuS用作超级电容器电极材料的电化学活性和循环稳定性亟须提升,旨在通过构建分级结构提升Cu S电化学活性面积,进而提升其超级电容性能。方法 采用水热法制备Cu S纳米材料,通过在水热反应前驱体中分别添加表面活性剂PEG400、OP10实现材料微观形貌和比表面积的调控,采用XRD、XPS、SEM、TEM、N2吸附-脱附测试、差示扫描量热法对制备产物的晶相、组成、微观形貌、比表面积和热稳定性进行了系统表征,通过循环伏安测试、恒电流充放电等电化学方法考察了CuS材料的超级电容性能及循环稳定性。结果 不同表面活性剂的加入显著影响了CuS材料的微观形貌、比表面积和超级电容性能。相比未添加表面活性剂和添加OP10,添加PEG400表面活性剂制备的CuS纳米材料具有更高的比表面积和独特的介孔分级结构,在1 A/g电流密度条件下,比电容可达785.5 F/g,且在8 A/g电流密度条件下循环2 000次后比电容仍可保持在初始值的77.8%,表现出更好的超级电容性能。结论 Cu S材料的微观形貌、比表面积对其超级电容性能有着较为显著的影响,较高的比表面积有利于增加与电解液的接触面积,特定的微观形貌可促进电解液中离子的输运和扩散,进而提升CuS材料的超级电容性能。To develop high-performance supercapacitors,the preparation of electrode materials with high capacitance,simple-operated and good chemical stability is highly desired.As one of widely used supercapacitor electrode materials,copper sulfide(CuS)is subject to electrochemical activity and cycling stability.The construction of three-dimensional nanostructures with hierarchical structures can increase the contact area between the electrode materials and the electrolyte,change the reaction kinetics occurring on the surface of the electrode materials,and thus improve the electrochemical performance.The hydrothermal method is a simple and convenient route to the tune structure and morphology of nanomaterials.Therefore,in this work,hierarchical CuS nanomaterials are prepared by a hydrothermal method,and the microstructure and specific surface area of the materials are regulated by adding surfactants PEG400 and OP-10 to the precursors of the hydrothermal reaction.The crystalline phases,compositions,microstructures,and specific surface areas of the prepared samples are systematically characterized by XRD,XPS,SEM,TEM,N2 adsorption-desorption and differential scanning calorimeter tests.The XRD and XPS results demonstrate that the addition of surfactant has little effect on the crystallinity and oxidation statements of elements in all three as-prepared samples.The SEM result shows that the addition of surfactant in hydrothermal process can changed the particle size and microstructure of as-prepared CuS samples.The N2 adsorption-desorption test confirms the alteration of as-prepared CuS samples after the addition of PEG400 and OP10,which is consistent with SEM results.The differential scanning calorimeter test shows that the addition of surfactants has little effect on the thermal stability of as-prepared CuS samples.The electrochemical performance and cycling stability of as-prepared CuS materials are investigated by electrochemical methods such as cyclic voltammetry test and constant-current charge/discharge.The result shows t

关 键 词：硫化铜 分级结构 超级电容性能 表面活性剂 水热反应 

分 类 号：TG174[金属学及工艺—金属表面处理]