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VN基材料的电子结构调控和超电容性能研究

张东彬 常智 滕艾均 刘天豪 代宇 彭显著 杜光超 康举

张东彬, 常智, 滕艾均, 刘天豪, 代宇, 彭显著, 杜光超, 康举. VN基材料的电子结构调控和超电容性能研究[J]. 钢铁钒钛, 2022, 43(5): 45-51. doi: 10.7513/j.issn.1004-7638.2022.05.007
引用本文: 张东彬, 常智, 滕艾均, 刘天豪, 代宇, 彭显著, 杜光超, 康举. VN基材料的电子结构调控和超电容性能研究[J]. 钢铁钒钛, 2022, 43(5): 45-51. doi: 10.7513/j.issn.1004-7638.2022.05.007
Zhang Dongbin, Chang Zhi, Teng Aijun, Liu Tianhao, Dai Yu, Peng Xianzhu, Du Guangchao, Kang Ju. Regulation on electronic structure of VN-based materials for enhanced supercapacitor performances[J]. IRON STEEL VANADIUM TITANIUM, 2022, 43(5): 45-51. doi: 10.7513/j.issn.1004-7638.2022.05.007
Citation: Zhang Dongbin, Chang Zhi, Teng Aijun, Liu Tianhao, Dai Yu, Peng Xianzhu, Du Guangchao, Kang Ju. Regulation on electronic structure of VN-based materials for enhanced supercapacitor performances[J]. IRON STEEL VANADIUM TITANIUM, 2022, 43(5): 45-51. doi: 10.7513/j.issn.1004-7638.2022.05.007

VN基材料的电子结构调控和超电容性能研究

doi: 10.7513/j.issn.1004-7638.2022.05.007
基金项目: 深水油气管线关键技术与装备北京市重点实验室开发课题资助项目(BIPT2020003)。
详细信息
    作者简介:

    张东彬,1990年出生,男,汉族,福建东山人,博士研究生,工程师,研究方向:新型储能器件关键技术开发与研究, E-mail: dongbin10010619@163.com

    通讯作者:

    滕艾均,1989年出生,男,汉族,河北沧州人,博士研究生,工程师,研究方向:冶金全流程、钒钛新材料及资源综合利用,E-mail: wdtaj2008@163.com

  • 中图分类号: TF841.3

Regulation on electronic structure of VN-based materials for enhanced supercapacitor performances

  • 摘要: 从改变VN材料固有本征特性的角度出发,提出了一种利用电子结构调控来改善VN材料电化学性能的方法。通过利用Fe元素的掺杂,调控材料的电子结构状态,达到调控其电化学性能的目的;通过XRD、HRTEM、XPS等方法表征Fe元素掺杂前后对VN基材料微观形貌和电子结构的影响;结合DFT计算结果表明:Fe元素的电子调控改变了VN材料的电子/离子输运能力,使得所制备的Fe-VN材料表现出优异的超电容性能;当电流密度为1 A/g时,其比容量为343.75 F/g,同时,经过1000次循环充放电后,仍能保持85%的初始容量。
  • 图  1  VN(a)与Fe-VN(b)的晶体结构模型,XRD(c)和Raman(d)表征

    Figure  1.  The crystal structure of (a) VN and (b) Fe-VN. (c) XRD and (d) Raman spectra

    图  2  VN(a)与Fe-VN(b)的HRTEM表征及Fe-VN的EDS(c)和Mapping(d)表征

    Figure  2.  The HRTEM images of (a) V and (b) Fe-VN. (c) EDS and (d) mapping of Fe-VN

    图  3  VN与Fe-VN的电化学性能测试

    (a) CV; (b) GCD; (c) EIS; (d) 循环寿命

    Figure  3.  The electrochemical performances of VN and Fe-VN

    图  4  VN与Fe-VN的XPS表征及分峰拟合

    (a) 全谱曲线; (b) Fe 2p; (c) V 2p; (d) N 2p

    Figure  4.  The XPS spectra of VN and Fe-VN

    图  5  Fe-VN(a, c)和VN(b, d)的差分电荷密度分布对比及相应晶体结构

    Figure  5.  The differential charge density distribution and crystal structures of (a, c) Fe-VN and (b, d) VN

    图  6  VN和Fe-VN的接触角性能测试及(200)晶面对OH的吸附能计算

    Figure  6.  (a) Contact angle tests and (b, c) adsorption energy of (200) lattice plane of VN and Fe-VN

    表  1  VN和Fe-VN的(200)晶面对OH的吸附能

    Table  1.   The adsorption energy of (200) lattice plane for OH

    材料吸附能/eV
    (200)+OH(200)OHEads
    Fe-VN−16083.98−15620.10−447.78−15.12
    VN−18262.59−17801.28−447.78−13.53
    下载: 导出CSV
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出版历程
  • 收稿日期:  2022-04-26
  • 网络出版日期:  2022-11-01
  • 刊出日期:  2022-11-01

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