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首页> 外文期刊>The journal of physical chemistry, B. Condensed matter, materials, surfaces, interfaces & biophysical >Hydrogen storage properties of Li-Mg-N-H systems with different ratios of LiH/Mg(NH2)(2)
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Hydrogen storage properties of Li-Mg-N-H systems with different ratios of LiH/Mg(NH2)(2)

机译：LiH / Mg（NH2）（2）不同比率的Li-Mg-N-H系统的储氢特性

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摘要

In this work, the hydrogen desorption and structural properties of the Li-Mg-N-H systems with different LiH/Mg(NH2)(2) ratios are systemically investigated. The results indicate that the system with the LiH/Mg(NH2)(2) ratio of 6/3 transforms into Li2NH and MgNH, and then, the mixture forms an unknown phase by a solid-solid reaction, which presumably is the ternary imide Li2Mg(NH)(2); the system with the LiH/Mg(NH2)(2) ratio of 8/3 transforms into 4Li(2)NH and Mg3N2 after releasing H-2 at T < 400 degrees C; the system with the LiH/Mg(NH2)(2) ratio of 12/3 transforms into 4Li(3)N and Mg3N2 after releasing H-2 at T > 400 degrees C, where the LiMgN phase is formed by the reaction between Li3N and Mg3N2. The characteristics of the phase transformations and the thermal gas desorption behaviors in these Li-Mg-N-H systems could be reasonably explained by the ammonia mediated reaction model, irrespective of the difference in the LiH/Mg(NH2)(2) ratios.
机译：在这项工作中，系统地研究了具有不同LiH / Mg（NH2）（2）比率的Li-Mg-N-H系统的氢解吸和结构性质。结果表明，LiH / Mg（NH2）（2）比为6/3的体系转化为Li2NH和MgNH，然后混合物通过固-固反应形成未知相，推测是三元酰亚胺Li2Mg（NH）（2）; LiH / Mg（NH2）（2）比为8/3的系统在T <400摄氏度释放H-2后转化为4Li（2）NH和Mg3N2; LiH / Mg（NH2）（2）比为12/3的系统在T> 400摄氏度释放H-2后转化为4Li（3）N和Mg3N2，其中LiMgN相是由Li3N之间的反应形成的和Mg3N2。这些Li-Mg-N-H系统中的相变特征和热气体脱附行为可以通过氨介导的反应模型来合理解释，而与LiH / Mg（NH2）（2）的比率无关。

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