高等学校化学学报 ›› 2022, Vol. 43 ›› Issue (10): 20220351.doi: 10.7503/cjcu20220351

• 物理化学 • 上一篇    下一篇

N-CNTs/NiCo-LDH复合材料的制备及电化学性能

侯从聪1, 王惠颖1, 李婷婷2, 张志明2(), 常春蕊3, 安立宝1()   

  1. 1.华北理工大学机械工程学院
    2.材料科学与工程学院
    3.理学院, 唐山 063210
  • 收稿日期:2022-05-17 出版日期:2022-10-10 发布日期:2022-07-11
  • 通讯作者: 张志明,安立宝 E-mail:zhangzhiming1942@163.com;lan@ncst.edu.cn
  • 基金资助:
    国家自然科学基金(51472074);河北省“百人计划”项目(E2012100005)

Preparation and Electrochemical Properties of N-CNTs/NiCo-LDH Composite

HOU Congcong1, WANG Huiying1, LI Tingting2, ZHANG Zhiming2(), CHANG Chunrui3, AN Libao1()   

  1. 1.College of Mechanical Engineering
    2.College of Materials Science and Engineering
    3.College of Sciences,North China University of Science and Technology,Tangshan 063210,China
  • Received:2022-05-17 Online:2022-10-10 Published:2022-07-11
  • Contact: ZHANG Zhiming,AN Libao E-mail:zhangzhiming1942@163.com;lan@ncst.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(51472074);the “Hundred Talents Program” of Hebei Province, China(E2012100005)

摘要:

通过高温碳化聚吡咯纳米管制备了氮掺杂碳纳米管(N-CNTs), 并采用共沉淀法将镍钴层状双氢氧化物(NiCo-LDH)原位生长在N-CNTs上, 制备出具有三维互联网状结构的N-CNTs/NiCo-LDH复合材料. 研究了镍钴摩尔比对N-CNTs/NiCo-LDH复合材料形貌结构和电化学性能的影响. 结果表明, 当镍钴摩尔比为1∶2时, N-CNTs/Ni1Co2-LDH具有最佳的电化学性能. 在1 A/g电流密度下, 其比电容可达1311.8 F/g; 当电流密度为 10 A/g时, 电容保持率高达88.3%, 展现出优异的倍率性; 在经过2500次循环后, 电容保持率仍可达76.4%, 具有良好的循环稳定性.由N-CNTs/Ni1Co2-LDH与活性炭(AC)电极所构建的N-CNTs/Ni1Co2-LDH//AC水系混合型超级电容器, 在750 W/kg功率密度下, 具有27.19 W·h/kg的高能量密度.

关键词: 氮掺杂碳纳米管, 镍钴层状双氢氧化物, 电极材料, 电化学性能, 超级电容器

Abstract:

Nitrogen-doped carbon nanotubes(N-CNTs) were prepared by carbonizing polypyrrole nanotubes at high temperature, and nickel-cobalt layered double hydroxides(NiCo-LDH) were in situ grown on N-CNTs by coprecipitation method to produce N-CNTs/NiCo-LDH composite with three-dimensional interconnected network structure. The effect of different nickel/cobalt molar ratios on the morphology, structure and electrochemical properties of N-CNTs/NiCo-LDH composite was investigated. The results showed that N-CNTs/Ni1Co2-LDH had the best electrochemical performance when the molar ratio of nickel/cobalt was 1∶2. The specific capacitance can reach 1311.8 F/g at a current density of 1 A/g. When the current density was 10 A/g, the capacitance retention rate of N-CNTs/Ni1Co2-LDH was as high as 88.3%, showing excellent rate capability. After 2500 cycles, the capacitance retention rate of N-CNTs/Ni1Co2-LDH can still reach 76.4%, revealing good cycling stability. In addition, the N-CNTs/Ni1Co2-LDH//AC aqueous hybrid supercapacitor assembled by using N-CNTs/Ni1Co2-LDH and activated carbon(AC) electrodes had a high energy density of 27.19 W·h/kg at 750 W/kg power density. The exceptional electrochemical performance indicated that N-CNTs/Ni1Co2-LDH composite had broad application prospects in energy storage.

Key words: Nitrogen-doped carbon nanotubes, Nickel-cobalt layered double hydroxides, Electrode material, Electrochemical performance, Supercapacitor

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