Hydrogen storage properties of pure Mg

• Published in: Korean Journal of Metals and Materials Vol. 52; no. 4; pp. 293 - 297
• Main Authors: Song, Myoung Youp, Kwak, Young Jun, Lee, Seong Ho, Park, Hye Ryoung
• Format: Journal Article
• Language: English
• Published: 대한금속·재료학회 05.04.2014
• Subjects: 재료공학
• ISSN: 1738-8228; 2288-8241
• DOI: 10.3365/KJMM.2014.52.4.293

The hydrogen storage properties of pure Mg are investigated at 573 K under 12 bar H2. In addition,in order to increase the hydriding and dehydriding rates of pure Mg, it is ground under hydrogen (reactivemechanical grinding, RMG), and its hydrogen storage properties are investigated. The pure Mg absorbshydrogen very slowly. At n = 1, the pure Mg absorbs 0.05 wt.% H for 5 min, 0.08 wt.% H for 10 min, and0.29 wt.% H for 60 min at 573 K under 12 bar H2. The hydriding rate decreases as the number of cyclesincreases from n = 7. At n = 7, the pure Mg absorbs 0.96 wt.% H for 5 min, 1.29 wt.% H for 10 min, and2.20 wt.% H for 60 min. At n = 1, the pure Mg after RMG does not absorb hydrogen. The hydriding rate of pureMg after RMG increases as the number of cycles increases from n = 1 to n = 11. The pure Mg after RMGabsorbs 1.91 wt.% H for 5 min, 2.61 wt.% H for 10 min, and 3.65 wt.% H for 60 min at n = 11. The reactivemechanical grinding of the pure Mg and the hydriding-dehydriding cycling of the pure Mg after RMG arebelieved to create defects on the surface and in the interior of Mg particles and to form cracks in Mgparticles. KCI Citation Count: 10