Hydrogen reactivity of Li-containing hydrogen storage materials
Hydrogen reactivity of Li-containing hydrogen storage materials
复制标题
DOI：
10.1016/s0925-8388(03)00357-8
复制
发表时间：
2003-08
影响因子：
6.2
通讯作者：
R. Genma;H. Uchida;N. Okada;Y. Nishi
中科院分区：
文献类型：
--
作者：
R. Genma;H. Uchida;N. Okada;Y. Nishi
在氢能系统中，储氢合金有望成为储能和储能的重要材料之一。然而，对于足够的氢气来说，它们的重量太大了，因此需要具有更高存储容量的轻质储氢材料。碱性络合物氢化物是一种很有前途的光储氢材料。在本研究中，我们尝试以Na-Li-Al系为基础，采用干法球磨作为机械合成的方法来制备样品，并研究其氢反应特性。对含10wt%La_2O_3的样品也进行了同样的研究，并比较了其氢气反应活性。起始物是LiAlH4，不是。他们用1巴Ar中脱水的己烷球磨。用高压Sievert‘s型装置测量了样品的氢反应性。NaH+LiH+Al样品在150min内可逆吸氢量约为1.9wt.%∼2.0wt.%。添加10wt%的La2O3后，催化剂的ab/脱附反应速率和循环放氢量均有所提高。
In hydrogen energy systems, the hydrogen storage alloy is expected as one of important materials for energy storage and transportation. However, they weigh so much for sufficient amounts of hydrogen, therefore, light hydrogen storage materials with much higher storage capacities are required. Alkaline complex hydrides are promising candidates as light hydrogen storage materials. In this study we tried to prepare a sample based on the Na–Li–Al system using the dry process of ball-milling as mechanical synthesis and investigate their hydrogen reaction characteristics. The same study for the sample with 10 wt.% La2O3was also carried out and its hydrogen reactivity compared. The starting materials were LiAlH4, NaH. They were ball-milled with hexane dehydrated in 1 bar Ar. The hydrogen reactivity of the samples obtained were measured by the high-pressure Sievert’s type apparatus. For the sample of NaH+LiH+Al, about 1.9∼2.0 wt.% of hydrogen was absorbed reversibly within 150 min. The addition of 10 wt.% La2O3improved both the ab/desorption reaction rate and cyclable hydrogen capacity.