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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Improved dehydrogenation properties of lithium alanate (LiAlH_4) doped by low energy grinding
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Improved dehydrogenation properties of lithium alanate (LiAlH_4) doped by low energy grinding

机译：通过低能研磨改善了掺杂的铝酸锂（LiAlH_4）的脱氢性能

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摘要

LiAlH_4 is an attractive hydrogen storage material because of its high gravimetric hydrogen storage capacity of 1 0.5 wt.%. There are various reports in the literature on doping LiAlH_4 with transition metals in order to improve its dehydrogenation kinetics. However, very often it was found that LiAlH_4 starts dehydro-genating already during doping, thereby, reducing the usable hydrogen storage capacity considerably.In this study, LiAlH_4 was doped by low-energy grinding with different transition metal chlorides (ZrCl_4, TiCl_3 and NiCl_2). Thus, unwanted dehydrogenation during doping could be prevented. The positive effect of the dopants on promoting the dehydrogenation of LiAlH_4 was systematically studied by thermal analysis. In addition, the crystal phases were characterized by X-ray diffraction. In view of long-term storability of suchlike doped LiAlH_4, the weight change was monitored at room temperature up to seven months.
机译：LiAlH_4是一种有吸引力的储氢材料，因为它具有1 0.5 wt。％的高重量氢存储容量。关于用过渡金属掺杂LiAlH_4以改善其脱氢动力学的文献中有各种报道。但是，人们经常发现LiAlH_4在掺杂过程中已经开始脱氢，从而大大降低了可用的储氢能力。 ）。因此，可以防止掺杂期间不希望的脱氢。通过热分析系统地研究了掺杂剂对促进LiAlH_4脱氢的积极作用。另外，晶相通过X射线衍射表征。考虑到这类掺杂的LiAlH_4的长期存储性，在室温下监测重量变化长达七个月。

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