Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7724418 | International Journal of Hydrogen Energy | 2011 | 7 Pages |
Abstract
A Mg-23.5wt%Ni-5wt%Cu alloy was synthesized by the gravity casting method in a large quantity (7.5 kg). From this alloy, Mg-23.5wt%Ni-xwt%Cu (x = 2.5, 5 and 7.5) samples for hydrogen storage were prepared by melt spinning and crystallization heat treatment. The samples were ground under H2 in order to obtain a fine powder. These alloys contained crystalline Mg and Mg2Ni phases. The Mg-23.5Ni-2.5Cu alloy had the highest hydriding and dehydriding rates after activation among these alloys. The dehydriding curve under 1.0 bar H2 at 573 K exhibits two stages; the dehydriding rate is high for about 2.5 min (the decomposition of Mg2Ni hydride and Mg hydride in small particles), and then it becomes lower (the decomposition of Mg hydride).
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Seong-Hyeon Hong, Jong-Soo Bae, Sung Nam Kwon, Myoung Youp Song,