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机械球磨AB5+x%80VFe复合储氢合金的微观结构与电化学性能

李丽荣

李丽荣. 机械球磨AB5+x%80VFe复合储氢合金的微观结构与电化学性能[J]. 钢铁钒钛, 2022, 43(4): 48-54. doi: 10.7513/j.issn.1004-7638.2022.04.008
引用本文: 李丽荣. 机械球磨AB5+x%80VFe复合储氢合金的微观结构与电化学性能[J]. 钢铁钒钛, 2022, 43(4): 48-54. doi: 10.7513/j.issn.1004-7638.2022.04.008
Li Lirong. Microstructure and electrochemical properties of ball-milled AB5+x%VFe alloys[J]. IRON STEEL VANADIUM TITANIUM, 2022, 43(4): 48-54. doi: 10.7513/j.issn.1004-7638.2022.04.008
Citation: Li Lirong. Microstructure and electrochemical properties of ball-milled AB5+x%VFe alloys[J]. IRON STEEL VANADIUM TITANIUM, 2022, 43(4): 48-54. doi: 10.7513/j.issn.1004-7638.2022.04.008

机械球磨AB5+x%80VFe复合储氢合金的微观结构与电化学性能

doi: 10.7513/j.issn.1004-7638.2022.04.008
基金项目: 国家自然科学基金资助项目(51961032);内蒙古自然科学基金分析测试专项(2022FX02)。
详细信息
    作者简介:

    李丽荣(1983-),女,内蒙古乌兰察布人,副教授,主要从事储氢材料研究,E-mail:nmg0809@163.com

  • 中图分类号: TF841.3,TG146.4

Microstructure and electrochemical properties of ball-milled AB5+x%VFe alloys

  • 摘要: 采用机械球磨方法制备了MlNi3.55Co0.75Mn0.4Al0.3+x%VFe(质量分数,x=5,10,15,20)储氢合金,研究了合金晶体结构和电化学性能。微结构分析表明,主相AB5晶胞参数a及体积V随球磨时间增加而增加。电化学研究表明,合金的最大容量Cmax及氢扩散系数Dx增加先增加后减少, x=10时达到最大值,分别为310 mAh/g和 7.6×10−11 cm2/s。对合金进行了循环稳定性测试,结果表明,MlNi3.55Co0.75Mn0.4Al0.3+10%VFe球磨10 h的合金在100次循环后放电容量保持率为98%。
  • 图  1  GITT法原理

    Figure  1.  Schematic diagram of GITT

    图  2  球磨15 h的XRD谱

    Figure  2.  The XRD patterns of composites ball-milled 15 h

    图  3  AB5+x%VFe复合储氢合金SEM图像

    Figure  3.  SEM images of ball-milled (15 h) MlNi3.55Co0.75Mn0.4Al0.3+x%VFe composites

    图  4  AB5+10%VFe储氢合金电子显微镜图像

    Figure  4.  SEM images of ball-milled MlNi3.55Co0.75Mn0.4Al0.3+10%VFe composites for different time

    图  5  AB5+10%VFe球磨15 h复合型储氢合金SEM及EDS分析

    Figure  5.  SEM images and EDS spectra of ball-milled (15 h) MlNi3.55Co0.75Mn0.4Al0.3+10%VFe composites

    图  6  最大放电比容量Cmax与钒铁添加量x的关系

    Figure  6.  Relationship between maximum capacity Cmax and x

    图  7  氢扩散系数与钒铁添加量x的关系

    Figure  7.  Relationship between diffusion coefficient D and x

    图  8  合金的循环稳定性曲线

    Figure  8.  Cyclic stability curves of alloys

    图  9  合金样品100次循环的容量保持率

    Figure  9.  Discharge capacity retention of the alloys after 100 charge-discharge cycles

    表  1  AB5+xVFe合金的晶胞参数

    Table  1.   Lattice parameters of AB5+xVFe alloy

    x/%t/ha/nmc/nmV/nm3c/a
    原合金0.4921(9)0.4276(5)0.089721(3)0.868(1)
    500.4920(5)0.4275(6)0.089649(1)0.868(1)
    550.4923(1)0.4274(5)0.089717(2)0.868(1)
    5100.4930(1)0.4274(1)0.089965(6)0.866(3)
    5150.4930(5)0.4274(2)0.089984(4)0.866(1)
    5200.5041(1)0.4273(8)0.094054(1)0.847(8)
    1000.4918(9)0.4274(5)0.089567(8)0.869(1)
    1050.4923(2)0.4274(5)0.090089(3)0.868(2)
    10100.4924(2)0.4275(4)0.089760(9)0.868(2)
    10150.4927(7)0.4275(1)0.089899(1)0.867(5)
    10200.5056(2)0.4280(1)0.094761(7)0.868(1)
    1500.4919(5)0.4275(5)0.089610(6)0.869(1)
    1550.4925(6)0.4273(6)0.089793(1)0.867(6)
    15100.4926(1)0.4276(4)0.089866(5)0.868(1)
    15150.4931(1)0.4280(4)0.090133(2)0.868(1)
    15200.5070(1)0.4226(5)0.094086(1)0.833(6)
    下载: 导出CSV

    表  2  AB5+10%VFe球磨15 h的EDS结果

    Table  2.   EDS results of AB5+10%VFe ball-milled 15 h

    元素复合相基体相
    w/%y/%w/%y/%
    La8.953.6628.7611.49
    Ni17.4416.8748.6345.96
    Co3.273.1510.329.71
    Mn4.214.354.214.26
    Al1.172.463.406.98
    V33.5637.40
    Fe28.7629.23
    下载: 导出CSV
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出版历程
  • 收稿日期:  2022-03-25
  • 刊出日期:  2022-09-14

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