발간논문

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Vol.50, No.12, 955 ~ 960, 2012
Title
Hydrogen Desorption and Absorption Properties of MgH2, LiBH4, and MgH2 + LiBH4 Composite
Hye Ryoung Park , Myoung Youp Song
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.
Key Words
hydrogen absorbing materials, mechanical alloying/milling, microstructure, X-ray diffraction, MgH2 + LiBH4
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