科研之友
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摘要
Although there have been numerous materials systems studied as potential candidates for hydrogen storage applications, none of the materials known to date has demonstrated enough hydrogen capacity or efficiency at required operating temperature ranges. There are still considerable opportunities for discovery of new materials or material systems that could lead to advances in science as well as commercial technologies in this area. LiAlH4 is one of the most promising materials owing to its high hydrogen content. In the present work, we investigated dehydrogenation properties of the combined system of LiAlH4 and LiNH2 under atmospheric argon. Thermogravimetric analysis (TGA) of 2LiAlH(4)/LiNH2 mixtures without any catalysts indicated that a large amount of hydrogen (similar to 8.1 wt %) can be released between 85 and 320 degrees C under a heating rate of 2 degrees C/min in three dehydrogenation reaction steps. It is found that LiNH2 effectively destabilizes LiAlH4 by reacting with LiH during the dehydrogenation process of LiAlH4.
- 出版日期2005-11-10
