Lithium nitride for reversible hydrogen storage

Ichikawa Takayuki

Isobe Shigehito

Hanada Nobuko

Fujii Hironobu

Journal of Alloys and Compounds

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 H2 is released in temperature range from 180 to 400 ℃ with 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 (1 mol.%). That is, the product desorbs a large amount of hydrogen (~5.5 wt.%) in the temperature from 150 to 250 ℃ under the condition of a heating rate of 5 ℃/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.

Hydrogen storage

Chemical hydride

Lithium amide, -imide, -hydride, -nitride

Ball milling

Ammonia

TiCl3

Physics [ 420 ]

eng

Elsevier B.V.

Copyright (c) 2003 Elsevier B.V.

[ISSN] 0925-8388

[DOI] 10.1016/S0925-8388(03)00637-6

[NCID] AA10817249

[DOI] http://dx.doi.org/10.1016/S0925-8388(03)00637-6