Destabilization of Li-based complex hydrides

Yuko Nakamori, Shin ichi Orimo

研究成果: Article査読

211 被引用数 (Scopus)

抄録

Fundamental researches on complex hydrides are recently of great importance to develop practical hydrogen storage materials with higher gravimetric hydrogen densities than those of conventional materials. First, in this paper, we clarify the correlation between B-H atomistic vibrations in [BH 4]--anion and melting temperatures of MBH4 (M=Li, Na, and K) as indexes of hydrogen desorption (decomposition) temperatures. This investigation implies that partial cation substitutions using smaller sized- and/or higher valenced-cations with higher electronegativities might provide higher energy modes of Raman spectra, and then, lower hydrogen desorption (decomposition) temperatures. Next, as an example, the hydrogen desorption properties of LiNH2 and its partial cation substitution are preliminary examined. The starting and ending temperatures for the hydrogen desoprtion reaction are actually lowered about 50K by the partial cation substitution of Li by Mg.

本文言語English
ページ(範囲)271-275
ページ数5
ジャーナルJournal of Alloys and Compounds
370
1-2
DOI
出版ステータスPublished - 2004 5月 12

ASJC Scopus subject areas

  • 材料力学
  • 機械工学
  • 金属および合金
  • 材料化学

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