Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5459962 | Journal of Alloys and Compounds | 2017 | 29 Pages |
Abstract
The Li-Mg-N-H system has been widely considered as one of the most promising candidates for on-board hydrogen storage due to its high reversible hydrogen capacity, good reversibility, and favorable thermodynamics. In this study, we show that the hydrogen storage properties of the 2LiNH2/MgH2 sample can be further promoted through the addition of Mg(BH4)2. The onset temperature for the dehydrogenation of the 2LiNH2/MgH2/0.1Mg(BH4)2 sample is only 80 °C, showing a reduction of around 50 °C with respect to the 2LiNH2/MgH2 sample. The hydrogenation tests indicate that the dehydrogenated 2LiNH2/MgH2/0.1Mg(BH4)2 sample could fully absorb about 5.0 wt% of hydrogen at 180 °C and 48 bar hydrogen pressure in 2 h, while only 3.5 wt% of hydrogen was recharged into the dehydrogenated 2LiNH2/MgH2 sample at 200 °C and 48 bar hydrogen pressure even within 30 h. The investigation on the structural changes and the cycling absorption/desortion of hydrogen was also performed. Moreover, the thermal conductivity of the as-milled 2LiNH2/MgH2 sample is almost doubled after the addition of 0.1Mg(BH4)2 without any loss of hydrogen capacity.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Shujun Qiu, Xingyu Ma, Errui Wang, Hailiang Chu, Jacques Huot, Yongjin Zou, Cuili Xiang, Fen Xu, Lixian Sun,