Storing hydrogen gas into cylinders under high pressure of 350 bar is not safe and still needs many intensive studies dedic ated for tank's manufacturing. Liquid hydrogen faces also severe practical difficulties due to its very low density, leading to larger fuel tanks three times larger than traditional gasoline tank. Moreover, converting hydrogen gas into liquid phase is not an economic process since it consumes high energy needed to cool down the gas temperature to -252.8 °C. One practical solution is storing hydrogen gas in metal lattice such as Mg powder and its nanocomposites in the form of MgH₂. There are two major issues should be solved first. One related to MgH₂ in which its inherent poor hydrogenation/dehydrogenation kinetics and high thermal stability must be improved. Secondly, related to providing a safe tank. Here we have succeeded to prepare a new binary system of MgH₂/5 wt. % TiMn₂ nanocomposite powder that show excellent hydrogenation/dehydrogenation behavior at relatively low temperature (250 °C) with long cycle-life-time (1400 h). Moreover, a simple hydrogen storage tank filled with our synthetic nanocomposite powders was designed and tested in electrical charging a battery of a cell phone device at 180 °C through a commercial fuel cell.

中文翻译：

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合成纳米复合材料MgH2 / 5 wt。用于与PEM燃料电池集成的固体氢储罐的％TiMn2粉末。

在350 bar的高压下将氢气存储到钢瓶中并不安全，仍然需要进行大量专门研究罐制造的深入研究。液态氢由于密度极低而面临着严重的实际困难，这导致大型燃料箱的体积是传统汽油箱的三倍。而且，将氢气转化为液相不是经济的过程，因为它消耗了将气体温度降低到-252.8°C所需的高能量。一种实际的解决方案是将氢气存储在诸如Mg粉末之类的金属晶格中，并将其以MgH ₂的形式存在于纳米复合材料中。首先要解决两个主要问题。一种与MgH _2有关其中必须改善其固有的不良氢化/脱氢动力学和高热稳定性。其次，涉及提供安全的坦克。在这里，我们已经成功准备的MgH的一个新的二进制系统₂ /5重量。％TiMn ₂纳米复合粉末，在较低的温度（250°C）下具有出色的加氢/脱氢性能，循环寿命长（1400 h）。此外，设计并测试了一个装有我们的合成纳米复合粉末的简单氢气存储罐，并通过商用燃料电池在180°C下为手机设备的电池充电。