两步溶剂热法构筑NCNF/NiCo-LDH/NiCo-LDH复合电极用于超级电容器  

Fabrication of NCNF/NiCo-LDH/NiCo-LDH composite electrode based on two step solvothermal reaction for supercapacitor

作　　者：李净珊 徐洋洋 叶仪鹏 董梦娇 李秉芯 陈昊天 LI Jingshan;XU Yangyang;YE Yipeng;DONG Mengjiao;LI Bingxin;CHEN Haotian(Research Institute of Textile and Clothing Industries,Zhongyuan University of Technology,Zhengzhou 450007,Henan,China;College of International Education,Zhongyuan University of Technology,Zhengzhou 450007,Henan,China)

机构地区：[1]中原工学院纺织服装产业研究院,河南郑州450007 [2]中原工学院国际教育学院,河南郑州450007

出　　处：《化工进展》2025年第1期379-387,共9页Chemical Industry and Engineering Progress

基　　金：国家留学基金委地方合作项目(202208410324);河南省高等学校重点研发项目(23A430008);河南省重点研发与推广专项(科技攻关)指导项目(222102230047);中国纺织工业联合会科技指导项目(2021047);中原工学院青年人才能力基金(K2020QN006);中原工学院研究生教育改革与质量提升工程项目;2023年第一批教育部产学合作协同育人项目(230800383251919,230825135207276)。

摘　　要：利用静电纺丝技术和高温碳化法制备氮掺杂碳纳米纤维(NCNF),通过两步溶剂热法在NCNF表面原位生长镍钴氢氧化物(NiCo-LDH)纳米片阵列,制备出NCNF/NiCo-LDH/NiCo-LDH复合电极。采用扫描电子显微镜(SEM)、X射线衍射(XRD)、傅里叶变换红外光谱(FTIR)和拉曼光谱(Raman)观察和分析复合电极的微观形貌和结构组成,并通过循环伏安(CV)、充放电(GCD)和交流阻抗(EIS)等技术研究复合电极的电化学性能。结果表明,两步溶剂热法在NCNF上构成由大片和小片交错连接的纳米片阵列,不仅有效提高了活性物质负载量,而且抑制了NiCo-LDH的团聚,增加了NiCo-LDH在NCNF上的分散性和电化学活性面积,所形成的NCNF/NiCo-LDH/NiCo-LDH复合电极在1A/g电流密度下的比电容为2898.7F/g;在10A/g高电流密度下,电容保持率可达到78.4%;连续充放电循环6000次后,电容保持率高达92.3%。以NCNF/NiCo-LDH/NiCo-LDH和活性炭(AC)组装的非对称超级电容器(NCNF/NiCo-LDH/NiCo-LDH//AC)在743.6W/kg功率密度下,具有69.1W·h/kg的高能量密度,10A/g下充放电循环6000次后,比电容能够保留初始值的93.4%。综合表明,NCNF/NiCo-LDH/NiCo-LDH复合电极是一种极具潜力的超级电容器电极材料。In this work,nitrogen doped carbon nanofibers(NCNF)were prepared by electrospinning and high-temperature carbonization treatment,and nickel cobalt layered double hydroxide(NiCo-LDH)nanosheets were in-situ grown on the surface of NCNF through two step solvothermal reaction to produce NCNF/NiCo-LDH/NiCo-LDH composite electrode.The morphology and structure of composite electrode were observed and analyzed by scanning electron microscopy(SEM),X-ray diffraction(XRD),fourier transform infrared spectroscopy(FTIR)and raman spectroscopy(Raman).Cyclic voltammetry(CV),constant current charge and discharge(GCD)and AC impedance(EIS)were used to investigate the electrochemical properties of composite electrode.As a result,the nanosheet array composed of large and small sheet could be formed on NCNF,the loading of active substances could be increased effectively,the agglomeration of NiCo-LDH could be inhibited,and the dispersion and electrochemical active area of NiCo-LDH on NCNF could be enhanced through the two-step solvothermal reaction.The NCNF/NiCo LDH/NiCo-LDH composite electrode demonstrated the superior electrochemical properties.The specific capacitance can reach 2898.7F/g at 1A/g,the capacitance retention rate was 78.4%at 10A/g,and after 6000 charge-discharge cycles,the capacitance retention was as high as 92.3%.An asymmetric supercapacitor(ASC)assembled using NCNF/NiCo-LDH/NiCo-LDH and activated carbon(AC)had a high energy density of up to 69.1W·h/kg with a power density of 743.6W/kg,and the capacitance retention was 93.4%after 6000 charge-discharge cycles at 10A/g.Therefore,the NCNF/NiCo-LDH/NiCo-LDH composite could be as promising electrode material for supercapacitor.

关 键 词：镍钴氢氧化物 纳米片 静电纺丝 氮掺杂碳纳米纤维 超级电容器 

分 类 号：O646[理学—物理化学] TM53[理学—化学]