Development of Mg-xFe_2O_3-yNi Hydrogen-Storage Alloys by Reactive Mechanical Grinding

• Published in: 대한금속·재료학회지, 50(10) pp. 769 - 774
• Main Authors: 송명엽, 권성남, 박혜령
• Format: Journal Article
• Language: English
• Published: 대한금속·재료학회 01.10.2012
• Subjects: 재료공학
• ISSN: 1738-8228; 2288-8241
• DOI: 10.3365/KJMM.2012.50.10.769

Mg-x wt% Fe_2O_3-y wt% Ni samples were prepared by reactive mechanical grinding in a planetary ball mill, and their hydrogen-storage properties were investigated and compared. Activations of Mg-5Fe_2O_3-5Ni was completed after one hydriding (under 12 bar H_2) – dehydriding (in vacuum) cycle at 593 K. At n = 2,Mg-5Fe_2O_3-5Ni absorbed 3.43 wt% H for 5 min, 3.57 wt% H for 10 min, 3.76 wt% H for 20 min, and 3.98 wt%H for 60 min. Activated Mg-10Fe_2O_3 had the highest hydriding rate, absorbing 2.99 wt% H for 2.5 min,4.86 wt% H for 10 min, and 5.54 wt% H for 60 min at 593 K under 12 bar H_2. Activated Mg-10Fe_2O_3-5Ni had the highest dehydriding rate, desorbing 1.31 wt% H for 10 min, 2.91 wt% H for 30 min, and 3.83 wt%H for 60 min at 593 K under 1.0 bar H_2. KCI Citation Count: 1