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Founded in 1987， Bimonthly
Supervisor：Jiangxi University Of Science And Technology
Sponsored by：Jiangxi University Of Science And Technology
Jiangxi Nonferrous Metals Society
ISSN：1674-9669
CN：36-1311/TF
CODEN YJKYA9
Volume 14 Issue 6
Dec.  2023
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LIU Li, YANG Tianhui, ZHOU Xi, MENG Ranhao. Effect of hydride on the hydrogen storage performance of Mg2Ni based alloys[J]. Nonferrous Metals Science and Engineering, 2023, 14(6): 825-832. DOI: 10.13264/j.cnki.ysjskx.2023.06.010
Citation: LIU Li, YANG Tianhui, ZHOU Xi, MENG Ranhao. Effect of hydride on the hydrogen storage performance of Mg2Ni based alloys[J]. Nonferrous Metals Science and Engineering, 2023, 14(6): 825-832. DOI: 10.13264/j.cnki.ysjskx.2023.06.010
shu

Effect of hydride on the hydrogen storage performance of Mg2Ni based alloys

  • 1.

    Jiyuan Vocational and Technical College, Jiyuan 459000, Henan, China

  • 2.

    Zhengzhou University, Zhengzhou 450001, China

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  • Received Date: October 16, 2022
  • Revised Date: January 01, 2023
  • Available Online: December 28, 2023
    Graphical Abstract
    • Abstract
  • Pure Mg2Ni, Mg2Ni with TiH2 of 10% and Mg2Ni with NbH of 10% hydrogen storage alloys were prepared by mechanical ball milling, respectively. The effects of additives (TiH2, NbH) on the phase composition, microstructure and hydrogen storage properties of Mg2Ni hydrogen storage alloys were studied. The results showed that the unit cell volume of the Mg2NiH4/Mg2Ni phase of hydrogen storage alloys added with 10% TiH2 or NbH, decreased to varying degrees, after sufficient hydrogen absorption/desorption, compared with pure Mg2Ni hydrogen storage alloy. TiH2 was uniformly distributed in the hydrogen storage alloys after mechanical ball milling, while NbH was agglomerated to a certain extent. The hydrogen absorption and desorption platforms of the hydrogen storage alloys with the addition of 10% TiH2 or NbH were higher, and the enthalpy change and entropy change in the process of hydrogen evolution reaction were smaller than that of pure Mg2Ni alloy. In the same amount of time, hydrogen evolution capacity of hydrogen storage alloys was listed in order from the largest to the smallest: Mg2Ni + 10% TiH2>Mg2Ni + 10% NbH>pure Mg2Ni alloy. When the temperature was 573 K, the time required for the hydrogen storage alloy to reach the maximum hydrogen release capacity in order from least to most was Mg2Ni + 10% TiH2 < Mg2Ni + 10% NbH < pure Mg2Ni alloy. Adding hydride TiH2 or NbH will increase the reaction rate constant of hydrogen storage alloys, and TiH2 improves hydrogen diffusion performance better than NbH.
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    • References (22)
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