A solvent- and catalyst-free hydrogenation synthesis methodology for lithium hydride (LiH) was developed at high altitude. The implementation of a dual thermostatic process proved to be pivotal in achieving high-crystallinity in the synthesized LiH. The synthesized LiH demonstrates a high degree of purity, reaching 99%. Hydrolysis experiments were conducted to measure the dehydrogenation amount, revealing a hydrogen weight percentage of 12.1%. The dehydrogenation rate was determined to be as high as 0.90 L/g·min. Furthermore, a comprehensive series of in-situ X-ray diffraction (XRD) and Raman spectroscopic characterizations were undertaken to elucidate the reaction dynamics of LiH when natural exposed to atmospheric conditions. This study presents an approach for the rapid and efficient production of lithium-based materials on a large scale intended for hydrogen storage.

中文翻译：

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高海拔无溶剂无催化剂加氢合成氢化锂

开发了一种无溶剂、无催化剂的高海拔氢化锂（LiH）加氢合成方法。事实证明，双恒温过程的实施对于合成 LiH 实现高结晶度至关重要。合成的LiH纯度很高，达到99%。进行水解实验测量脱氢量，结果显示氢重量百分比为12.1%。测定脱氢速率高达0.90 L/g·min。此外，还进行了一系列全面的原位 X 射线衍射 (XRD) 和拉曼光谱表征，以阐明 LiH 在自然暴露于大气条件下时的反应动力学。这项研究提出了一种快速有效地大规模生产用于储氢的锂基材料的方法。