Recent development on hydrogen storage properties in metal-N-H systems

T. Ichikawa, H. Y. Leng, S. Isobe, N. Hanada, H. Fujii

研究成果: Article査読

38 被引用数 (Scopus)

抄録

In this paper, we review our recent results on hydrogen storage properties in light metals(M)-nitrogen(N)-hydrogen(H) systems prepared by mechanochemical method. At first, the composite mixture of LiH and LiNH2 doped with TiCl3 as a catalyst was prepared by ball milling for 2 h under a H2 gas pressure of 1 MPa. The TDS profile indicated that ∼6 mass% H2 was desorbed by the reaction LiH + LiNH2 ↔ Li2NH + H2 in the temperature range from 150 to 250 °C under a He gas flow at a heating rate of 5 °C min-1, but the H-desorption equilibrium pressure PH2 was ∼0.1 MPa at 250 °C. This temperature is too high for onboard use, indicating that further improvement is necessary to destabilize the above H-storage reaction. For that, we clarified the H-desorption mechanism by the isotopic exchange experiments, on the basis of which we designed a new Li-Mg-N-H composite system with the reaction 8LiH + 3Mg(NH2)2 ↔ 4Li2NH + Mg3N2 + 8H2. This composite materials desorbed ∼7 mass% H2 in the range from 120 to 200 °C and the H-desorption equilibrium pressure PH2 was higher than 5 MPa at 200 °C, indicating that this system has an excellent potential for onboard applications.

本文言語English
ページ(範囲)126-131
ページ数6
ジャーナルJournal of Power Sources
159
1 SPEC. ISS.
DOI
出版ステータスPublished - 2006 9 13
外部発表はい

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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