Synthesis of LiNH2 films by vacuum evaporation
Synthesis of LiNH2 films by vacuum evaporation
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DOI：
10.1016/j.jallcom.2004.01.038
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发表时间：
2004-09
影响因子：
6.2
通讯作者：
Y. Nakamori;T. Yamagishi;M. Yokoyama;S. Orimo
中科院分区：
文献类型：
--
作者：
Y. Nakamori;T. Yamagishi;M. Yokoyama;S. Orimo
采用真空蒸发法制备了新型可逆储氢材料LiNH2，纯度为99.9%的Li元素在金属衬底上真空蒸发，然后用高纯气体进行氮化和氢化反应。随着蒸发时间的延长，样品的形貌从接近50μm的岛状(873K，加热至设定温度0min)转变为厚度接近500μm的均匀平坦的薄膜(873K，30min)，初步的热脱附测量表明，薄膜的放氢温度低于块体(粉末)样品。
LiNH2, a new candidate of reversible hydrogen storage materials, was synthesized by vacuum evaporation of elemental Li with 99.9%-purity onto a metallic substrate, and subsequent nitrogenation and hydrogenation using high-purity gases. Depending on the evaporation time, the sample morphologies change from an island-shape with nearly 50μm (873K for 0min; just heated-up to the set temperature) to a homogeneously flat film (873K for 30min) with a thickness of nearly 500μm. The preliminary thermal desorption measurement implies a lower temperature hydrogen desorption from the film than that from bulk (powder) sample.