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多级次孔结构ZnMn2O4微球负极的研究

任衍彪 张世超 张临财 何小武 赵金光

任衍彪, 张世超, 张临财, 等 . 多级次孔结构ZnMn2O4微球负极的研究[J]. 北京航空航天大学学报, 2020, 46(2): 259-265. doi: 10.13700/j.bh.1001-5965.2019.0190
引用本文: 任衍彪, 张世超, 张临财, 等 . 多级次孔结构ZnMn2O4微球负极的研究[J]. 北京航空航天大学学报, 2020, 46(2): 259-265. doi: 10.13700/j.bh.1001-5965.2019.0190
REN Yanbiao, ZHANG Shichao, ZHANG Lincai, et al. Hierarchical porous ZnMn2O4 microsphere anode[J]. Journal of Beijing University of Aeronautics and Astronautics, 2020, 46(2): 259-265. doi: 10.13700/j.bh.1001-5965.2019.0190(in Chinese)
Citation: REN Yanbiao, ZHANG Shichao, ZHANG Lincai, et al. Hierarchical porous ZnMn2O4 microsphere anode[J]. Journal of Beijing University of Aeronautics and Astronautics, 2020, 46(2): 259-265. doi: 10.13700/j.bh.1001-5965.2019.0190(in Chinese)

多级次孔结构ZnMn2O4微球负极的研究

doi: 10.13700/j.bh.1001-5965.2019.0190
基金项目: 

中国博士后科学基金 2018M632635

枣庄学院博士研究基金 2018BS056

国家电网公司科技项目 52170217000L

详细信息
    作者简介:

    任衍彪  男,博士, 讲师。主要研究方向:纳米能源材料及电极催化剂

    张世超 男,博士,教授,博士生导师。主要研究方向:锂二次电池电极材料

    张临财  男,博士, 副教授。主要研究方向:生物基材料

    何小武  男, 博士。主要研究方向:荧光材料。E-mail:hexw@semi.ac.cn

    赵金光  男,博士,研究员。主要研究方向:电网储能

    通讯作者:

    何小武. E-mail:hexw@semi.ac.cn

  • 中图分类号: TB321

Hierarchical porous ZnMn2O4 microsphere anode

Funds: 

China Postdoctoral Science Foundation 2018M632635

the Doctoral Research Foundation of Zaozhuang University 2018BS056

the State Grid Company Research Program of Science and Technology 52170217000L

More Information
  • 摘要:

    利用水热法合成了Zn-Mn氧化物前驱体,在温度400、500、600、700℃下,空气气氛中煅烧前驱体,以此来制备纳米片组装成的分级多孔结构的ZnMn2O4微球。其中,在500℃空气中煅烧前驱体制备的ZnMn2O4(ZMO-500)微球具有丰富的多级次孔结构,其作为锂离子电池负极材料,在500 mA/g的电流密度下,ZMO-500微球负极材料循环500次以后仍具有1 132 mAh/g高的放电比容量。ZMO-500负极材料优异的电化学性能得益于其分级多孔结构,不仅可以增加电极和电解质之间的接触面积以促进锂离子的迁移,而且还为循环过程中电极体积膨胀提供足够的缓冲空间。

     

  • 图 1  Zn-Mn氧化物前驱体在低倍和高倍下的SEM照片

    Figure 1.  Low-magnification and high-magnification SEM images of precursor of Zn-Mn oxides

    图 2  Zn-Mn氧化物前驱体XRD图谱和DSC-TG曲线

    Figure 2.  XRD pattern and DSC-TG curves of precursor of Zn-Mn oxides

    图 3  所制备的ZMO的XRD图谱

    Figure 3.  XRD patterns of synthesized ZMO

    图 4  ZMO-500在低倍和高倍下的SEM照片, TEM和HRTEM照片,以及ZMO-500材料N2吸脱附曲线(插图为ZMO-500的孔径分布)

    Figure 4.  Low-magnification and high-magnification SEM images, TEM image and HRTEM image of ZMO-500, N2 adsorption/desorption isotherm of ZMO-500 (inset of ZMO-500 pore size distribution)

    图 5  3种样品的SEM照片

    Figure 5.  SEM images of three samples

    图 6  ZMO-500电极的CV曲线、放-充电曲线和循环性能

    Figure 6.  CV curves, discharge-charge curves and cycling performance of ZMO-500 electrode

    图 7  ZMO-400, ZMO-500, ZMO-600和ZMO-700在500 mA/g电流密度下的循环性能比较

    Figure 7.  Comparison of cycle performance among ZMO-400, ZMO-500, ZMO-600 and ZMO-700 at 500 mA/g

    图 8  不同循环次数下在中-高频ZMO-500电极的EIS数据(插图为放大图),及阻抗曲线的实部值与低频区角频率的倒数平方根关系曲线

    Figure 8.  EIS data and its enlargement (inset) at medium-high frequency region for different cycles, plot of real part of impedance as a function of reciprocal root square of lower angular frequencies

    图 9  ZMO-500电极在500 mA/g下循环500次以后低倍和高倍SEM照片

    Figure 9.  Low-magnification and high-magnification SEM images of ZMO-500 electrode after 500 cycles at 500 mA/g

    表  1  不同循环次数ZMO-500电极的Warburg阻抗系数和锂离子扩散系数

    Table  1.   Warburg impedance coefficient and lithium ion diffusion coefficient of ZMO-500 electrodes at different cycles

    循环次数 σ/(Ω·cm2·s-0.5) D/(cm2·s-1)
    第1次 36.17 1.70×10-14
    第50次 66.66 4.99×10-15
    第200次 36.37 1.68×10-14
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出版历程
  • 收稿日期:  2019-04-28
  • 录用日期:  2019-08-05
  • 刊出日期:  2020-02-20

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