Lithium amidoborane (LiAB) is known as an efficient hydrogen storage material. The dehydrogenation reaction of LiAB was studied employing temperature-programmed desorption methods at varying temperature and H₂ pressure. As the dehydrogenation products are in amorphous form, the XRD technique is not useful for their identification. The two-step decomposition temperatures (74 and 118 °C) were found to hardly change in the 1–80 bar pressure range. This is related either to kinetic effects or to thermal dependence of the reaction enthalpy. Further, the possible joint decomposition of LiNH₂BH₃ with LiBH₄ or MgH₂ was investigated. Indeed LiBH₄ proved to destabilize LiAB, producing a 10 °C decrease of the first-step decomposition temperature, whereas no significant effect was observed by the addition of MgH₂. The 5LiNH₂BH₃ + LiBH₄ assemblage shows improved hydrogen storage properties with respect to pure lithium amidoborane.

中文翻译：

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LiNH 2 BH 3 / MgH 2和LiNH 2 BH 3 / LiBH 4双组分氢化物体系的脱氢特性，用于储氢应用

酰胺基硼烷锂（LiAB）是一种有效的储氢材料。研究了LiAB的脱氢反应，采用程序升温脱附方法，在不同温度和H ₂压力下进行了研究。由于脱氢产物为无定形形式，因此XRD技术无法用于其鉴定。发现两步分解温度（74和118°C）在1–80 bar的压力范围内几乎没有变化。这与动力学或反应焓的热依赖性有关。此外，研究了LiNH ₂ BH ₃与LiBH ₄或MgH ₂可能的联合分解。确实是LiBH ₄事实证明，LiAB不稳定，第一步分解温度降低10°C，而加入MgH ₂则未观察到明显的影响。5LiNH ₂ BH ₃  + LiBH ₄组合物相对于纯氨基硼烷锂显示出改善的储氢性能。