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Nanostructures of LiBH4: a density-functional study

机译:LiBH4的纳米结构:密度泛函研究

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The phase stability and electronic structure of alpha-LiBH4-derived nanostructures and possible low energy surfaces of thin films have been investigated using the ab initio projected augmented plane wave method. Structural optimizations based on total energy calculations predicted that, for the alpha-LiBH4 phase, the (010) surface is the most stable of the possible low-energy surfaces. The predicted critical sizes of the nano-cluster and nano-whisker for alpha-LiBH4 are 1.75 and 1.5 nm, respectively. Similarly, the bond distances in the surfaces of a nano-whisker are found to be higher than that in the bulk material. The calculated hydrogen site energies suggest that it is relatively easier to remove hydrogen from the surface of the clusters and nano-whiskers than from bulk crystals.
机译:使用从头算投影增强平面波方法研究了α-LiBH4衍生的纳米结构的相稳定性和电子结构以及薄膜可能的低能表面。基于总能量计算的结构优化预测,对于α-LiBH4相,(010)表面是可能的低能量表面中最稳定的表面。纳米团簇和纳米晶须对于α-LiBH4的预测临界尺寸分别为1.75和1.5 nm。类似地,发现纳米晶须表面中的键合距离高于块状材料中的键合距离。计算得出的氢位能表明,从团簇和纳米晶须表面除去氢比从大晶体中除去氢相对容易。

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