Acta Metallurgica Sinica (English Letters) ›› 2017, Vol. 30 ›› Issue (11): 1040-1048.DOI: 10.1007/s40195-017-0638-8

Special Issue: 能源材料专辑(2016-2017)

• Orginal Article • Previous Articles     Next Articles

A Comparison Study of Hydrogen Storage Thermodynamics and Kinetics of YMg11Ni Alloy Prepared by Melt Spinning and Ball Milling

Yang-Huan Zhang1,2,*(), Wei Zhang1,2, Jin-Liang Gao3, Ze-Ming Yuan1,2, Wen-Gang Bu2, Yan Qi2   

  1. 1 Key Laboratory of Integrated Exploitation of Baiyun Obo Multi-Metal Resources, Inner Mongolia University of Science and Technology, Baotou 014010, China
    2 Department of Functional Material Research, Central Iron and Steel Research Institute, Beijing 100081, China
    3 Weishan Cisri-Eare Earth Materials Co., Ltd., Jining 277600, China
  • Received:2017-08-14 Revised:2017-08-14 Online:2017-11-20 Published:2018-01-30
  • Contact: Zhang Yang-Huan

Abstract:

Melt spinning (MS) and ball milling (BM) were employed to fabricate YMg11Ni alloy, and their structures and hydrogen storage performances were examined. The results reveal that the as-spun and as-milled alloys both exhibit the nanocrystalline and amorphous structure. The as-milled alloy shows a larger hydrogen absorption capacity as compared with the as-spun alloy. More than that, the as-milled alloy exhibits lower onset hydrogen desorption temperature than the as-spun one, which are 549.8 and 560.9 K, respectively. Additionally, the as-milled alloy shows a superior hydrogen desorption property to the as-spun one. On the basis of the time needed by desorbing hydrogen of 3 wt% H2, for the as-milled alloy, it needs 1106, 456, 343, and 180 s corresponding to hydrogen desorption temperatures of 593, 613, 633, and 653 K. However, for the as-spun alloy, the time needed is greater than 2928, 842, 356, and 197 s corresponding to the same temperatures. Hydrogen desorption activation energies of as-milled and as-spun alloys are 98.01 and 105.49 kJ/mol, respectively, which is responsible for that the as-milled alloy possesses a much faster dehydriding rate. By means of the measurement of pressure-composition-temperature (P-C-T) curves, the dehydrogenation enthalpy change of the alloys prepared by MS (ΔH de(MS)) and BM (ΔH de(BM)) is 81.84 and 79.46 kJ/mol, respectively, viz. ΔH de(MS) > ΔH de(BM).

Key words: Mg-based alloy, Ball milling, Melt spinning, Hydrogen storage kinetics, Comparison