Improvement of hydrogen-storage properties of MgH2 by addition of Li3N, LiBH4, Fe and/or Ti

被引：10
作者：
Song, Myoung Youp [1 ]
Kwon, Sung Nam [2 ]
Kwak, Young Jun [3 ]
Park, Hye Ryoung [4 ]
机构：
[1] Chonbuk Natl Univ, Engn Res Inst, Res Ctr Adv Mat Dev, Div Adv Mat Engn, Jeonju 561756, South Korea
[2] Chonbuk Natl Univ, Dept Hydrogen & Fuel Cells Engn, Specialized Grad Sch, Jeonju 561756, South Korea
[3] Chonbuk Natl Univ, Dept Mat Engn, Grad Sch, Jeonju 561756, South Korea
[4] Chonnam Natl Univ, Sch Appl Chem Engn, Kwangju 500757, South Korea
来源：
MATERIALS RESEARCH BULLETIN | 2013年 / 48卷 / 01期
关键词：
Hydrides; Metals; Electron microscopy; X-ray diffraction; Energy storage; MAGNESIUM; NI; PERFORMANCE; COMPOSITE;
D O I：
10.1016/j.materresbull.2012.10.007
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In order to increase hydrogen storage capacity of MgH2-based materials, Li3N, LiBH4, Fe, and/or Ti were added. Mixtures with compositions of 50MgH(2)-50Li(3)N, 40Mg-10MgH(2)-50Li(3)N, 68MgH(2)-17LiBH(4)-15Fe, and 70MgH(2)-17LiBH(4)-13Ti were prepared by reactive mechanical grinding and their hydrogen-storage properties were examined. 40Mg-10MgH(2)-50Li(3)N after hydriding-dehydriding cycling contains Mg3N2, LiMgN, LiOH, and MgO, LiH, and NH3 center dot 2H(2)O, suggesting a reaction of 6Mg + 4MgH(2) + 4Li(3)N + 23H(2)O -> Mg3N2 + LiMgN + 11LiOH + 3NH(3)center dot 2H(2)O + 6MgO + 7H(2). 70MgH(2)-17LiBH(4)-13Ti after hydriding-dehydriding cycling contained MgH2, TiH1.924, Mg, and MgO. Among the samples studied, 70MgH(2)-17LiBH(4)-13Ti had the highest hydriding rate in the beginning. The as-milled 70MgH(2)-17LiBH(4)-13Ti sample absorbed 3.33 wt% H for 5 min, 3.83 wt% H for 10 min, and 3.94 wt% H for 60 min at 573 K under 12 bar H-2. (C) 2012 Elsevier Ltd. All rights reserved.
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页码：74 / 78
页数：5
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