Development of light hydrogen storage adsorption material for safe hydrogen society with contribution of energy policy

氢气被认为是最清洁的能源，是解决环境问题的有效燃料。然而，氢气的单位体积能量很小，因此人们希望开发一种有效的方法来将氢储存在轻材料中。我们的目标是制备全铝块体材料的H。一旦氢化物在Al表面附近形成，H就不会扩散到块体中，H会阻止表面区域。在形成氢化物之前，促进氢扩散到铝体中是非常重要的。为此，用分子动力学方法对AlH3进行了模拟。我们还建议使用铝阳极涂层，改变氢在铝中的成键方式。我们在NIMS制备了样品，并在Spring8进行了高压加氢实验(Saitoh博士)。铝体内部通过阳极涂层进行氢化，增加了储氢量。我们注意到，阳极涂层是一种很有希望的制备块状AlH3材料的方法。

Hydrogen (H) is considered to be the ultimate clean energy and an effective fuel to overcome the environmental problem. However, H gas has very small energy per volume and is desired to develop effective way to store H in a light material. Our goal is to prepare the H of whole Al bulk materials. Once the hydride is formed near surface of Al, H does not diffuse into the bulk and H stops the surface region. It is very important to facilitate H diffusion into the Al bulk before forming hydride. For this purpose, AlH3 is simulated by molecular dynamics. We also propose to use anodic coating of Al and change the bonding of H in Al. We prepared the samples at NIMS and experiments of hydrogenation under high pressure were performed at Spring8 (Dr. Saitoh). The hydrogenation takes place inside the Al bulk by anodic coating, and the amount of H storage is increased. We note that the anodic coating is a hopeful way to prepare bulk AlH3 materials.