| Title |
Hydrogen Desorption and Absorption Properties of MgH2, LiBH4, and MgH2 + LiBH4 Composite |
| Authors |
(Hye Ryoung Park); (Myoung Youp Song) |
| DOI |
https://doi.org/10.3365/KJMM.2012.50.12.955 |
| ISSN |
1738-8228(ISSN), 2288-8241(eISSN) |
| Keywords |
hydrogen absorbing materials; mechanical alloying/milling; microstructure; X-ray diffraction; MgH2 + LiBH4 |
| Abstract |
To increase the hydrogen storage capacity of Mg-based materials, a sample with a composition of 69.7 wt% MgH2 + 30.3 wt% LiBH4 was prepared by planetary ball milling under hydrogen. The absorption and desorption properties of unmilled MgH2, unmilled LiBH4, and 69.7 wt% MgH2 + 30.3 wt% LiBH4 were examined. At 648 K the unmilled MgH2 desorbed 5.70 wt% for 60 min. The unmilled LiBH4 desorbed 6.40 wt% H for 780 min at 673 K. The 69.7 wt% MgH2 + 30.3 wt% LiBH4 sample desorbed 3.10 wt% H for 50 min, and 3.32 wt% H for 300 min at 623 K at the second cycle. |