Development of Mg-Li-B based advanced materials for an onboard storage solution
Development of Mg-Li-B based advanced materials for an onboard storage solution
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开发基于镁锂硼的先进材料用于车载存储解决方案
DOI：
10.1016/j.ijhydene.2016.10.061
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
G. K. Dey
中科院分区：
文献类型：
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作者：
S. Kumar U. Jain;A. Jain;H. Miyaoka;T. Ichikawa;Y. Kojima;G. K. Dey
硼氢化锂-氢化镁（LiBH 4-MgH 2）反应性复合材料由于具有较高的储氢容量而被认为是储氢材料的潜在候选材料之一。由于动力学约束，复合材料需要高温（>500 °C）以使其理论储氢容量超过80%。因此，需要合适的催化剂来降低脱氢温度。在此基础上，研究了ZrCl_4对LiBH_4-MgH_2反应性复合材料脱氢反应的催化作用。结果表明，脱氢反应的表观活化能随起始脱氢温度的降低而显著降低。X射线衍射分析表明，脱氢复合材料中存在Mg单键Li金属间化合物两相。Mg单键Li金属间相的形成最终增加了氢释放的量，并且在再氢化期间可能是有益的。MgH 2-LiBH 4催化剂在温和条件下脱氢有利于MgB 2的生成。
Lithium borohydride-magnesium hydride (LiBH4–MgH2) reactive composite has been considered as one of the potential candidate for energy storage in the form of hydrogen because of its high hydrogen storage capacity. The composite requires high temperature (>500 °C) to dehydrogenate above 80% of its theoretical hydrogen storage capacity due to kinetic constraints. Therefore, a suitable catalyst is required to lower the dehydrogenation temperature. In this regard, the catalytic effect of ZrCl4on the dehydrogenation of LiBH4–MgH2reactive composite has been studied. It was found that the apparent activation energy of dehydrogenation decreases considerably followed by reduction in onset dehydrogenation temperature. The X-ray diffraction analysis of dehydrogenated composite has shown two phase of Mgsingle bondLi intermetallics. The formation of Mgsingle bondLi intermetallic phases eventually increases the amount of hydrogen release and, it could be beneficial during rehydrogenation. Moreover, dehydrogenation of catalyzed MgH2–LiBH4favors the formation of MgB2under mild conditions.