Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9803248 | Journal of Alloys and Compounds | 2005 | 4 Pages |
Abstract
Structural differences in LiBH4 before and after the melting reaction at approximately 550âK were investigated to clarify the experimental method for the confirmation of reversible dehydriding and rehydriding reactions. Since the long-range order of LiBH4 begins to disappear after the melting reaction was achieved, investigation of the atomistic vibrations of the [BH4]-anion in LiBH4 was found to be effective for the confirmation of the reversibility. In the present study, LiBH4 was successively dehydrided (decomposed) into LiH and B under 1âMPa of hydrogen at 873âK, and then rehydrided (recombined) into LiBH4 under 35âMPa of hydrogen at the same temperature (873âK). The temperatures at the beginning and ending of the dehydriding reaction are lowered, by approximately 30âK, for LiBH4 substituted (or mixed) with Mg (atomic ratio of Li:Mg=9:1) as compared to those for LiBH4 alone. This is similar to the tendency exhibited by LiNH2.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
S. Orimo, Y. Nakamori, G. Kitahara, K. Miwa, N. Ohba, S. Towata, A. Züttel,