无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ

无机盐工业 ›› 2022, Vol. 54 ›› Issue (8): 66-73.doi: 10.19964/j.issn.1006-4990.2021-0695

• 研究与开发 • 上一篇    下一篇

卤离子调控的镍钴基电极材料生长及电容影响研究

蒋甜甜(),许雪棠(),王凡   

  1. 广西大学化学化工学院,广西 南宁 530004
  • 收稿日期:2021-11-17 出版日期:2022-08-10 发布日期:2022-08-11
  • 作者简介:蒋甜甜(1996— ),女,硕士研究生,研究方向为超级电容器电极材料;E-mail:1596348300@qq.com
  • 基金资助:
    国家自然科学基金项目(22065003);广西自然科学基金面上项目(2018GXNSFAA294049)

Research on growth and supercapacitance of NiCo based electrode materials regulated by halogen ions

JIANG Tiantian(),XU Xuetang(),WANG Fan   

  1. School of Chemistry and Chemical Engineering,Guangxi University,Nanning 530004,China
  • Received:2021-11-17 Published:2022-08-10 Online:2022-08-11

摘要:

超级电容器是很有发展潜力的电化学储能器件,其性能主要取决于电极材料。利用水热法,通过改变加入的卤离子(F-、Cl-、Br-)种类,可以简便地对镍钴(NiCo)基超级电容器电极材料的形貌、物相以及化学组成进行调控。由X射线衍射(XRD)和扫描电镜(SEM)等表征结果可知,F- 诱导生成纳米片支撑纳米线阵列,成分为稳定的NiCo LDH结构;Cl-/Br- 诱导生成纳米线,成分为碱式碳酸钴。从电化学测试结果可知,形貌和晶型对电化学性能有显著的影响。其中Cl- 调控的电极在120 ℃下反应3 h时,其形貌为纳米线,晶型偏向无定形,此时性能最优;在2 mA/cm2电流密度下不仅具有最大的面积比电容2 940 mF/cm2,且该电极与负极活性炭组装的器件具有1.8 V的大电压窗口和优异的循环稳定性。

关键词: 形貌, 卤离子调控, 水热法, NiCo基, 超级电容器

Abstract:

Supercapacitors are potential electrochemical energy storage devices whose performance depends on electrode materials.The morphology,phase and chemical composition of NiCo-bsaed supercapacitor electrode materials could be easily controlled by hydrothermal method by changing the kinds of added halogen ions(F-,Cl-,Br-).The results of X-ray diffraction(XRD) and scanning electron microscopy(SEM) showed that nanosheet?support?nanowire arrays with a stable NiCo LDH structure were synthesized by the induce of F-,nanowires and the main ingredient Co2(CO3)(OH)2·H2O were synthesized by the induce of Cl- or Br-.The electrochemical results indicated that the morphology and crystal shape had significant influence on electrochemical performance.The performance was optimal at Cl- doping and reaction at 120 ℃ for 3 h,under this condition,the morphology was nanowires,and the crystal form changed into amorphous structure.The best sample not only exhibited a maximum specific capacitance of 2 940 mF/cm2 at 2 mA/cm2,but also the devices assembled with the electrode and cathode activated carbon had a voltage window of 1.8 V and exhibited an excellent cycling stability.

Key words: morphology, halogen ions regulation, hydrothermal treatment, NiCo-based, supercapacitor

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