Lithium nitride for reversible hydrogen storage
Lithium nitride for reversible hydrogen storage
复制标题
DOI：
10.1016/s0925-8388(03)00637-6
复制
发表时间：
2004-02-25
影响因子：
6.2
通讯作者：
Fujii, H
中科院分区：
文献类型：
--
作者：
Ichikawa, T;Isobe, S;Fujii, H
在本文中，我们研究了作为可逆储氢材料候选的氨基锂LiNH2和氢化锂LiH 1:1混合物的基本性质。没有任何催化剂的球磨混合物的热解吸质谱表明，在180至400℃的温度范围内释放出氢气H-2，同时释放出大量的氨NH3。另一方面，在含有少量催化剂、Ni、Fe、Co金属和TiCl3 (1 mol.%)的1:1混合物中，含有少量TiCl3作为催化剂的球磨混合物表现出最优异的储氢性能。也就是说，该产品在5℃/min的升温速率条件下，在150℃至250℃的温度下脱附大量的氢气（约5.5wt.%），但在我们的实验精度内完全不脱附氨。此外，我们还证实该产品具有出色的循环保持能力，有效氢容量超过 5 wt.%，并且反应速率高达至少 3 个循环。 (C) 2003 Elsevier B.V. 保留所有权利。
In this paper, we examined the basic properties in the 1:1 mixture of lithium amide LiNH2 and lithium hydride LiH as a candidate of reversible hydrogen storage materials. The thermal desorption mass spectra of the ball milled mixture without any catalysts indicated that hydrogen H-2 is released in the temperature range from 180 to 400degreesC while emitting a considerable amount of ammonia NH3. On the other hand, the ball milled mixture containing a small amount of TiCl3 as a catalyst showed the most superior hydrogen storage properties among the 1: 1 mixtures with a small amount of catalysts, Ni, Fe, Co metals and TiCl3 (I mol.%). That is, the product desorbs a large amount of hydrogen (similar to5.5 wt.%) in the temperature from 150 to 250degreesC under the condition of a heating rate of 5 degreesC/min, but it does not desorb ammonia at all within our experimental accuracy. In addition, we confirmed that the product shows an excellent cycle retention with an effective hydrogen capacity of more than 5 wt.% and a high reaction rate until at least 3 cycles. (C) 2003 Elsevier B.V. All rights reserved.