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
研究与开发

水热法可控制备NiMoO4纳米片微球及其超级电容器性能

  • 赵志超 ,
  • 王洪林 ,
  • 王侠 ,
  • 孙刚 ,
  • 赵翠莲 ,
  • 孙楠楠
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  • 1.河北水利电力学院基础部,河北沧州 061001
    2.河北省数据中心相变热管理技术创新中心
赵志超(1986— ),男,工学博士,讲师,研究方向为新能源材料与高储能器件;E-mail: zczhaoseu@163.com

收稿日期: 2021-04-16

  网络出版日期: 2022-03-14

基金资助

河北省高等学校青年拔尖人才计划项目(BJ2019055);沧州市自然科学基金面上项目(204001001);河北水利电力学院博士科研启动项目(SYBJ1901);河北省自然科学基金(B2021412001)

Controllable preparation of NiMoO4 nanosheets-based microspheres by hydrothermal method and their supercapacitor properties

  • Zhichao ZHAO ,
  • Honglin WANG ,
  • Xia WANG ,
  • Gang SUN ,
  • Cuilian ZHAO ,
  • Nannan SUN
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  • 1. Department of Basic,Hebei University of Water Resources and Electric Engineering,Cangzhou 061001,China
    2. Hebei Technology Innovation Center of Phase Change Thermal Management of Data Center

Received date: 2021-04-16

  Online published: 2022-03-14

摘要

以硝酸镍和钼酸钠为原料,聚乙烯吡咯烷酮为结构导向剂,采用水热-热处理方法在镍网基底上制备了NiMoO4纳米片微球。通过XRD、Raman、SEM以及TEM测试表征了所得NiMoO4纳米片微球的结构与形貌。测试结果表明,三维微/纳分级结构的β-NiMoO4纳米片微球的直径范围为2.3~3.0 μm,且纳米片微球是由厚度约为16 nm的纳米片相互交错而成。研究分析了β-NiMoO4纳米片微球的生长机理。电化学测试结果表明,NiMoO4纳米片微球电极在6 mol/L KOH电解液中、1 A/g电流密度下的比电容高达1 161.8 F/g,这可归因于其独特的三维微/纳分级结构在电荷存储过程中可提供更多的氧化还原反应活性位点。另外,NiMoO4纳米片微球电极的分级结构可减缓充放电循环过程中的体积变化,保持结构的稳定性,使其在20 A/g大电流密度下,循环2 000次后的电容保持率为82.2%,展现出良好的循环性能。

本文引用格式

赵志超 , 王洪林 , 王侠 , 孙刚 , 赵翠莲 , 孙楠楠 . 水热法可控制备NiMoO4纳米片微球及其超级电容器性能[J]. 无机盐工业, 2022 , 54(2) : 60 -64 . DOI: 10.19964/j.issn.1006-4990.2021-0249

Abstract

NiMoO4 nanosheets-based microspheres were successfully fabricated on nickel foam substrate through hydro-thermal method combined with an annealing post-treatment,using nickel nitrate and sodium molybdate as raw materials and polyvinyl pyrrolidone as structure directing agent.The structure and morphology of the obtained NiMoO4 nanosheets-based microspheres were characterized by XRD,Raman,SEM and TEM.The test results showed that the β-NiMoO4 nanosheets-based microspheres with three-dimensional micro/nano hierarchical structure and a diameter of 2.3~3.0 μm,was consisted of numerous interlaced nanosheets with thickness of about 16 nm.The growth mechanism of β-NiMoO4 nanosheets-based mi-crospheres was studied.Electrochemical tests showed NiMoO4 nanosheets-based microspheres electrode exhibited high spe-cific capacitance of 1 161.8 F/g at current density of 1 A/g in 6 mol/L KOH electrolyte,which was attributed to the unique features of three-dimensional micro/nano hierarchical structure that could provide more redox active sites during the charge storage process.Additionally,this hierarchical structure of NiMoO4 nanosheets-based microspheres electrode could alleviate the volume variation during the charge/discharge cycling process and maintain the stability of the structure.Thus,NiMoO4 na-nosheets-based microspheres electrode showed a capacitance retention of 82.2% after 2 000 cycles at a large current density of 20 A/g,indicating good cycling stability.

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